Australia's Gambling Industries - Productivity Commission

The use of this sampling approach meant that a slightly more complex weighting
scheme needed to be used in Phase 2. The data for non gamblers and non-regular
gamblers were weighted up, using weighting factors from the information on the
population for non gamblers and non-regular gamblers obtained in the screener
questionnaire (see section F.7).
F.3 Phase 1 — the screener questionnaire
The screener questionnaire sought information on:
• gender of respondent; household size (number of adults in the household); and
age of respondent;
• whether respondents had participated in one or more of twelve gambling
activities in the last 12 months; and
• how frequently respondents had participated in each of these gambling activities
in the last 12 months.
The questions on gambling participation and frequency served as filters for
distinguishing between non gamblers, non-regular gamblers and regular gamblers. A
simplified schematic representation is provided in figure F.1.
Figure F.1
Simplified operation of filters in screener questionnaire
Non gambler
No
Participant
Have you participated in
any gambling activity
in the last 12 months?
Non-regular
gambler
Yes
No
Gambler
Have you gambled
as often as at least
once per w eek?
Yes
Regular
gambler
NATIONAL GAMBLING
SURVEY
F.5