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CONCLUSION 117 groups does one turn next for data Second, for what theoretical purposes does one seek further data In response to the first, Glaser and Strauss (1967: 49) suggest that the decision is based on theoretical relevance, i.e. those groups that will assist in the generation of as many properties and categories as possible. Hence the size of the data set may be fixed by the number of participants in the organization, or the number of people to whom one has access, but the researcher has to consider that the door may have to be left open for him/her to seek further data in order to ensure theoretical adequacy and to check what has been found so far with further data (Flick et al.2004:170).Inthiscaseitisnotalways possible to predict at the start of the research just how many, and who, the research will need for the sampling; it becomes an iterative process. Non-probability samples also reflect the issue that sampling can be of people but it can also be of issues. Samples of people might be selected because the researcher is concerned to address specific issues, for example, those students who misbehave, those who are reluctant to go to school, those with a history of drug dealing, those who prefer extra-curricular to curricular activities. Here it is the issue that drives the sampling, and so the question becomes not only ‘whom should I sample’ but also ‘what should I sample’ (Mason 2002: 127–32). In turn this suggests that it is not only people who may be sampled, but texts, documents, records, settings, environments, events, objects, organizations, occurrences, activities and so on. Planning a sampling strategy There are several steps in planning the sampling strategy: 1 Decidewhetheryouneedasample,orwhether it is possible to have the whole population. 2 Identifythepopulation,itsimportantfeatures (the sampling frame) and its size. 3 Identify the kind of sampling strategy you require (e.g. which variant of probability and non-probability sample you require). 4 Ensurethataccesstothesampleisguaranteed. If not, be prepared to modify the sampling strategy (step 2). 5 For probability sampling, identify the confidence level and confidence intervals that you require. For non-probability sampling, identify the people whom you require in the sample. 6 Calculatethenumbersrequiredinthesample, allowing for non-response, incomplete or spoiled responses, attrition and sample mortality, i.e. build in redundancy. 7 Decide how to gain and manage access and contact (e.g. advertisement, letter, telephone, email, personal visit, personal contacts/friends). 8 Be prepared to weight (adjust) the data, once collected. Conclusion The message from this chapter is the same as for many of the others – that every element of the research should not be arbitrary but planned and deliberate, and that, as before, the criterion of planning must be fitness for purpose. Theselection of a sampling strategy must be governed by the criterion of suitability. The choice of which strategy to adopt must be mindful of the purposes of the research, the time scales and constraints on the research, the methods of data collection, and the methodology of the research. The sampling chosen must be appropriate for all of these factors if validity is to be served. To the question ‘how large should my sample be’, the answer is complicated. This chapter has suggested that it all depends on: population size confidence level and confidence interval required accuracy required (the smallest sampling error sought) number of strata required number of variables included in the study variability of the factor under study Chapter 4
118 SAMPLING the kind of sample (different kinds of sample within probability and non-probability sampling) representativeness of the sample allowances to be made for attrition and nonresponse need to keep proportionality in a proportionate sample. That said, this chapter has urged researchers to use large rather than small samples, particularly in quantitative research.
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Research Methods in Education This
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First published 2007 by Routledge 2
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Contents List of boxes xiii Acknowl
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CONTENTS ix Searching for research
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CONTENTS xi Part 5 Data analysis 22
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xiv BOXES 13.1 Independent and depe
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xvi BOXES 24.54 Frequencies and per
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xviii ACKNOWLEDGEMENTS Springer,for
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2 INTRODUCTION Package for the Soci
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1 The nature of inquiry - Setting t
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TWO CONCEPTIONS OF SOCIAL REALITY 7
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POSITIVISM 9 Box 1.1 The subjective
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THE ASSUMPTIONS AND NATURE OF SCIEN
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THE ASSUMPTIONS AND NATURE OF SCIEN
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THE SCIENTIFIC METHOD 15 an educate
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CRITICISMS OF POSITIVISM AND THE SC
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ALTERNATIVES TO POSITIVISTIC SOCIAL
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A QUESTION OF TERMINOLOGY: THE NORM
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PHENOMENOLOGY, ETHNOMETHODOLOGY AND
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CRITICISMS OF THE NATURALISTIC AND
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CRITICAL THEORY AND CRITICAL EDUCAT
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CRITICISMS OF APPROACHES FROM CRITI
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CRITICAL THEORY AND CURRICULUM RESE
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THE EMERGING PARADIGM OF COMPLEXITY
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FEMINIST RESEARCH 35 deconstructin
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FEMINIST RESEARCH 37 respecting d
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FEMINIST RESEARCH 39 Research must
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RESEARCH AND EVALUATION 41 particul
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RESEARCH AND EVALUATION 43 The age
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RESEARCH AND EVALUATION 45 to exten
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METHODS AND METHODOLOGY 47 too easi
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Part Two Planning educational resea
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52 THE ETHICS OF EDUCATIONAL AND SO
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54 THE ETHICS OF EDUCATIONAL AND SO
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56 THE ETHICS OF EDUCATIONAL AND SO
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58 THE ETHICS OF EDUCATIONAL AND SO
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60 THE ETHICS OF EDUCATIONAL AND SO
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62 THE ETHICS OF EDUCATIONAL AND SO
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64 THE ETHICS OF EDUCATIONAL AND SO
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66 THE ETHICS OF EDUCATIONAL AND SO
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68 THE ETHICS OF EDUCATIONAL AND SO
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70 THE ETHICS OF EDUCATIONAL AND SO
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72 THE ETHICS OF EDUCATIONAL AND SO
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74 THE ETHICS OF EDUCATIONAL AND SO
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76 THE ETHICS OF EDUCATIONAL AND SO
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3 Planning educational research Int
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80 PLANNING EDUCATIONAL RESEARCH t
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82 PLANNING EDUCATIONAL RESEARCH de
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84 PLANNING EDUCATIONAL RESEARCH Bo
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86 PLANNING EDUCATIONAL RESEARCH Bo
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88 PLANNING EDUCATIONAL RESEARCH Bo
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90 PLANNING EDUCATIONAL RESEARCH Bo
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92 PLANNING EDUCATIONAL RESEARCH Bo
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94 PLANNING EDUCATIONAL RESEARCH Bo
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96 PLANNING EDUCATIONAL RESEARCH Or
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98 PLANNING EDUCATIONAL RESEARCH Pa
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4 Sampling Introduction The quality
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102 SAMPLING sample of 200 might be
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104 SAMPLING Box 4.1 Sample size, c
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106 SAMPLING would be insufficient
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108 SAMPLING The formula assumes th
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110 SAMPLING school governors, scho
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112 SAMPLING terms of sex, a random
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114 SAMPLING the required sample si
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116 SAMPLING Snowball sampling In s
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120 SENSITIVE EDUCATIONAL RESEARCH
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122 SENSITIVE EDUCATIONAL RESEARCH
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124 SENSITIVE EDUCATIONAL RESEARCH
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126 SENSITIVE EDUCATIONAL RESEARCH
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128 SENSITIVE EDUCATIONAL RESEARCH
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130 SENSITIVE EDUCATIONAL RESEARCH
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132 SENSITIVE EDUCATIONAL RESEARCH
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134 VALIDITY AND RELIABILITY It is
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136 VALIDITY AND RELIABILITY using
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138 VALIDITY AND RELIABILITY includ
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140 VALIDITY AND RELIABILITY leadin
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142 VALIDITY AND RELIABILITY social
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144 VALIDITY AND RELIABILITY this i
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146 VALIDITY AND RELIABILITY prese
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148 VALIDITY AND RELIABILITY by ass
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150 VALIDITY AND RELIABILITY Validi
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152 VALIDITY AND RELIABILITY typica
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154 VALIDITY AND RELIABILITY people
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156 VALIDITY AND RELIABILITY
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158 VALIDITY AND RELIABILITY sensit
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160 VALIDITY AND RELIABILITY certif
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162 VALIDITY AND RELIABILITY how m
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164 VALIDITY AND RELIABILITY operat
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7 Naturalistic and ethnographic res
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ELEMENTS OF NATURALISTIC INQUIRY 16
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PLANNING NATURALISTIC RESEARCH 171
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PLANNING NATURALISTIC RESEARCH 173
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PLANNING NATURALISTIC RESEARCH 175
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PLANNING NATURALISTIC RESEARCH 177
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PLANNING NATURALISTIC RESEARCH 179
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PLANNING NATURALISTIC RESEARCH 181
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PLANNING NATURALISTIC RESEARCH 183
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PLANNING NATURALISTIC RESEARCH 185
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CRITICAL ETHNOGRAPHY 187 Relatio
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SOME PROBLEMS WITH ETHNOGRAPHIC AND
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8 Historical and documentary resear
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DATA COLLECTION 193 One can see fro
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WRITING THE RESEARCH REPORT 195 Ext
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THE USE OF QUANTITATIVE METHODS 197
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LIFE HISTORIES 199 Box 8.2 Atypolog
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DOCUMENTARY RESEARCH 201 Documentar
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DOCUMENTARY RESEARCH 203 What are
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9 Surveys, longitudinal, cross-sect
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SOME PRELIMINARY CONSIDERATIONS 207
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PLANNING A SURVEY 209 structured or
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LONGITUDINAL, CROSS-SECTIONAL AND T
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LONGITUDINAL, CROSS-SECTIONAL AND T
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STRENGTHS AND WEAKNESSES OF LONGITU
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STRENGTHS AND WEAKNESSES OF LONGITU
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POSTAL, INTERVIEW AND TELEPHONE SUR
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POSTAL, INTERVIEW AND TELEPHONE SUR
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POSTAL, INTERVIEW AND TELEPHONE SUR
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EVENT HISTORY ANALYSIS 225 may be p
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INTERNET-BASED SURVEYS 227 packages
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INTERNET-BASED SURVEYS 229 instruc
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INTERNET-BASED SURVEYS 231 Box 10.1
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INTERNET-BASED SURVEYS 233 Box 10.1
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INTERNET-BASED SURVEYS 235 Box 10.1
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INTERNET-BASED SURVEYS 237 Witte et
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INTERNET-BASED EXPERIMENTS 239 requ
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INTERNET-BASED INTERVIEWS 241 ‘ne
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SEARCHING FOR RESEARCH MATERIALS ON
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COMPUTER SIMULATIONS 245 autho
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COMPUTER SIMULATIONS 247 computer s
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COMPUTER SIMULATIONS 249 On the oth
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GEOGRAPHICAL INFORMATION SYSTEMS 25
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11 Case studies What is a case stud
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WHAT IS A CASE STUDY 255 (providing
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WHAT IS A CASE STUDY 257 argue that
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EXAMPLES OF KINDS OF CASE STUDY 259
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PLANNING A CASE STUDY 261 accounts
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CONCLUSION 263 In the narrativ
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CO-RELATIONAL AND CRITERION GROUPS
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CHARACTERISTICS OF EX POST FACTO RE
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DESIGNING AN EX POST FACTO INVESTIG
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PROCEDURES IN EX POST FACTO RESEARC
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INTRODUCTION 273 Box 13.1 Independe
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TRUE EXPERIMENTAL DESIGNS 275 motor
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TRUE EXPERIMENTAL DESIGNS 277 2 Sub
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TRUE EXPERIMENTAL DESIGNS 279 textb
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TRUE EXPERIMENTAL DESIGNS 281 Facto
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A QUASI-EXPERIMENTAL DESIGN: THE NO
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PROCEDURES IN CONDUCTING EXPERIMENT
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EXAMPLES FROM EDUCATIONAL RESEARCH
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EVIDENCE-BASED EDUCATIONAL RESEARCH
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EVIDENCE-BASED EDUCATIONAL RESEARCH
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EVIDENCE-BASED EDUCATIONAL RESEARCH
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EVIDENCE-BASED EDUCATIONAL RESEARCH
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14 Action research Introduction Act
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PRINCIPLES AND CHARACTERISTICS OF A
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PRINCIPLES AND CHARACTERISTICS OF A
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ACTION RESEARCH AS CRITICAL PRAXIS
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PROCEDURES FOR ACTION RESEARCH 305
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PROCEDURES FOR ACTION RESEARCH 307
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PROCEDURES FOR ACTION RESEARCH 309
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SOME PRACTICAL AND THEORETICAL MATT
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CONCLUSION 313 3 Actionresearchreso
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15 Questionnaires Introduction The
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APPROACHING THE PLANNING OF A QUEST
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TYPES OF QUESTIONNAIRE ITEMS 321 If
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TYPES OF QUESTIONNAIRE ITEMS 323 de
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TYPES OF QUESTIONNAIRE ITEMS 325 Ra
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TYPES OF QUESTIONNAIRE ITEMS 327 Ve
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TYPES OF QUESTIONNAIRE ITEMS 329 I
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TYPES OF QUESTIONNAIRE ITEMS 331 Fu
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ASKING SENSITIVE QUESTIONS 333 and
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AVOIDING PITFALLS IN QUESTION WRITI
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QUESTIONNAIRES CONTAINING FEW VERBA
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COVERING LETTERS OR SHEETS AND FOLL
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PILOTING THE QUESTIONNAIRE 341 Nove
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PRACTICAL CONSIDERATIONS IN QUESTIO
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ADMINISTERING QUESTIONNAIRES 345 is
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PROCESSING QUESTIONNAIRE DATA 347 B
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16 Interviews Introduction The use
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PURPOSES OF THE INTERVIEW 351 appli
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TYPES OF INTERVIEW 353 closed quant
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TYPES OF INTERVIEW 355 One can clus
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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PLANNING INTERVIEW-BASED RESEARCH P
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GROUP INTERVIEWING 373 an intro
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INTERVIEWING CHILDREN 375 taking pl
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THE NON-DIRECTIVE INTERVIEW AND THE
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TELEPHONE INTERVIEWING 379 By mean
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TELEPHONE INTERVIEWING 381 questi
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ETHICAL ISSUES IN INTERVIEWING 383
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PROCEDURES IN ELICITING, ANALYSING
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PROCEDURES IN ELICITING, ANALYSING
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DISCOURSE ANALYSIS 389 completeness
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ACCOUNT GATHERING IN EDUCATIONAL RE
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STRENGTHS OF THE ETHOGENIC APPROACH
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A NOTE ON STORIES 395 instruments t
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INTRODUCTION 397 the physical s
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STRUCTURED OBSERVATION 399 Box 18.1
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STRUCTURED OBSERVATION 401 Box 18.2
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STRUCTURED OBSERVATION 403 or event
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NATURALISTIC AND PARTICIPANT OBSERV
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NATURALISTIC AND PARTICIPANT OBSERV
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ETHICAL CONSIDERATIONS 409 Box 18.3
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SOME CAUTIONARY COMMENTS 411 ob
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CONCLUSION 413 the data mean. This
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NORM-REFERENCED, CRITERION-REFERENC
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COMMERCIALLY PRODUCED TESTS AND RES
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CONSTRUCTING A TEST 419 achieveme
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CONSTRUCTING A TEST 421 Select the
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CONSTRUCTING A TEST 423 where A = t
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CONSTRUCTING A TEST 425 true/fal
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CONSTRUCTING A TEST 427 short-answe
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CONSTRUCTING A TEST 429 demonstrate
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CONSTRUCTING A TEST 431 (e.g. to as
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COMPUTERIZED ADAPTIVE TESTING 433 H
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20 Personal constructs Introduction
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ALLOTTING ELEMENTS TO CONSTRUCTS 43
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PROCEDURES IN GRID ANALYSIS 439 inv
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PROCEDURES IN GRID ANALYSIS 441 Box
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SOME EXAMPLES OF THE USE OF REPERTO
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GRID TECHNIQUE AND AUDIO/VIDEO LESS
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FOCUSED GRIDS, NON-VERBAL GRIDS, EX
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INTRODUCTION 449 Box 21.1 Dimension
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ROLE-PLAYING VERSUS DECEPTION: THE
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THE USES OF ROLE-PLAYING 453 of
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ROLE-PLAYING IN AN EDUCATIONAL SETT
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EVALUATING ROLE-PLAYING AND OTHER S
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22 Approaches to qualitative data a
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TABULATING DATA 463 data set reprod
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TABULATING DATA 465 Box 22.4 Studen
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FIVE WAYS OF ORGANIZING AND PRESENT
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SYSTEMATIC APPROACHES TO DATA ANALY
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SYSTEMATIC APPROACHES TO DATA ANALY
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METHODOLOGICAL TOOLS FOR ANALYSING
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23 Content analysis and grounded th
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HOW DOES CONTENT ANALYSIS WORK 477
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HOW DOES CONTENT ANALYSIS WORK 479
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HOW DOES CONTENT ANALYSIS WORK 481
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A WORKED EXAMPLE OF CONTENT ANALYSI
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A WORKED EXAMPLE OF CONTENT ANALYSI
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COMPUTER USAGE IN CONTENT ANALYSIS
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COMPUTER USAGE IN CONTENT ANALYSIS
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GROUNDED THEORY 491 data, thereby c
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GROUNDED THEORY 493 fragments are t
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INTERPRETATION IN QUALITATIVE DATA
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INTERPRETATION IN QUALITATIVE DATA
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INTERPRETATION IN QUALITATIVE DATA
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24 Quantitative data analysis Intro
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DESCRIPTIVE AND INFERENTIAL STATIST
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DEPENDENT AND INDEPENDENT VARIABLES
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EXPLORATORY DATA ANALYSIS: FREQUENC
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EXPLORATORY DATA ANALYSIS: FREQUENC
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EXPLORATORY DATA ANALYSIS: FREQUENC
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EXPLORATORY DATA ANALYSIS: FREQUENC
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STATISTICAL SIGNIFICANCE 515 alongt
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STATISTICAL SIGNIFICANCE 517 hands
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HYPOTHESIS TESTING 519 selection fr
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EFFECT SIZE 521 differential measur
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EFFECT SIZE 523 Box 24.17 The Leven
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THE CHI-SQUARE TEST 525 The Effect
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DEGREES OF FREEDOM 527 Box 24.22 A2
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MEASURING ASSOCIATION 529 Box 24.23
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MEASURING ASSOCIATION 531 found and
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MEASURING ASSOCIATION 533 Box 24.26
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MEASURING ASSOCIATION 535 Many usef
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REGRESSION ANALYSIS 537 we know or
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REGRESSION ANALYSIS 539 Box 24.32 S
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REGRESSION ANALYSIS 541 Box 24.35 S
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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MEASURES OF DIFFERENCE BETWEEN GROU
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25 Multidimensional measurement and
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FACTOR ANALYSIS 561 Box 25.1 Rank o
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FACTOR ANALYSIS 563 Box 25.3 The st
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FACTOR ANALYSIS 565 Box 25.5 Ascree
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FACTOR ANALYSIS 567 Box 25.7 The ro
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FACTOR ANALYSIS 569 The school
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FACTOR ANALYSIS: AN EXAMPLE 571 sco
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FACTOR ANALYSIS: AN EXAMPLE 573 Box
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FACTOR ANALYSIS: AN EXAMPLE 575 Box
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EXAMPLES OF STUDIES USING MULTIDIME
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MULTIDIMENSIONAL DATA: SOME WORDS O
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MULTIDIMENSIONAL DATA: SOME WORDS O
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MULTILEVEL MODELLING 583 Degrees of
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CLUSTER ANALYSIS 585 Box 25.22 Clus
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→ → → → HOW MANY SAMPLES 58
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HOW MANY SAMPLES 589 Box 26.4 Choos
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ASSUMPTIONS OF TESTS 591 Box 26.5 c
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Notes 1 THE NATURE OF INQUIRY - SET
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NOTES 595 Gender and Careers. Lewes
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NOTES 597 is widespread, indeed the
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Bibliography Acker, S. (1989) Teach
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BIBLIOGRAPHY 601 Bannister, D. and
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BIBLIOGRAPHY 603 Brenner, M., Brown
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BIBLIOGRAPHY 605 Cohen, L. and Holl
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BIBLIOGRAPHY 607 or case-based Euro
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BIBLIOGRAPHY 609 Fendler, L. (1999)
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BIBLIOGRAPHY 611 the Powerful in Ed
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BIBLIOGRAPHY 613 Hanna, G. S. (1993
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BIBLIOGRAPHY 615 Jones, S. (1987) T
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BIBLIOGRAPHY 617 IL: Bureau of Econ
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BIBLIOGRAPHY 619 McNiff, J., Lomax,
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BIBLIOGRAPHY 621 Morrison, K. R. B.
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BIBLIOGRAPHY 623 Patton, M. Q. (198
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BIBLIOGRAPHY 625 Muliak and J. H. S
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Page 646 and 647:
BIBLIOGRAPHY 627 Smith, M. L. and G
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Page 648 and 649:
BIBLIOGRAPHY 629 Thorne, B. (1994)
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Page 650 and 651:
BIBLIOGRAPHY 631 Whyte, W. F. (1993
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Page 652 and 653:
INDEX Absolutism 51, 61-2 Access 51
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Page 654 and 655:
INDEX 635 face validity see validit
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Page 656 and 657:
INDEX 637 qualitative research 19-2