National Survey of Fishing, Hunting, and Wildlife ... - All About Birds

Detailed SamplesTwo independent detailed samples werechosen from the FHWAR screeningsample. One consisted of sportspersons(people who hunt or fish) and theother of wildlife watchers (people whoobserve, photograph, or feed wildlife).A. SportspersonsThe Census Bureau selected thedetailed samples based on informationreported during the screeningphase. Based on informationcollected from the householdrespondent, every person 16 yearsold and older in the FHWARscreening sample was assigned to asportspersons stratum. The criteriafor the strata included time devotedto hunting or fishing in previousyears, participation in hunting orfishing in 2011 by the time of thescreening interview, and intentionsto participate in hunting and fishingactivities during the remainderof 2011. 3 The four sportspersonscategories were:1. Active—a person who hadalready participated in huntingor fishing in 2011 at the time ofthe screener interview.2. Likely—a person who had notparticipated in 2011 at the timeof the screener, but had participatedin 2010 OR was likely toparticipate in 2011.3. Inactive—a person who had notparticipated in 2010 or 2011AND was somewhat unlikely toparticipate in 2011.4. Nonparticipant—a person whohad not participated in 2010 or2011 AND was very unlikely toparticipate in 2011.Due to the high noncontact rates inwave 1, all persons in the active,likely, and inactive groups wereselected with certainty.Active sportspersons were giventhe detailed interview twice—atthe time of the screening interview(in April, May, or June 2011) and3The sample cases selected due to high noncontact rateswere not assigned a sportsperson stratum.again in January or February 2012. 4Likely sportspersons and inactivesportspersons were also interviewedtwice—first in Septemberor October 2011, then in Januaryor February 2012. Persons in thenonparticipant group were noteligible for a detailed interview.About 16,400 persons were designatedfor interviews in the UnitedStates. The detailed sportspersonssample sizes varied by state toget reliable state-level estimates.During each interview period,about 31 percent of the designatedpersons were not found at home orwere unavailable for some otherreason. Overall, about 11,300detailed sportspersons interviewswere completed at a response rateof 69 percent.B. Wildlife WatchersThe wildlife-watching detailedsample was also selected based oninformation reported during thescreening phase. Based on informationcollected from the householdrespondent, every person 16 yearsold and older was assigned to astratum. The criteria for the strataincluded time devoted to wildlifewatchingactivities in previousyears, participation in wildlifewatchingactivities in 2011 by thetime of the screening interview,and intentions to participate inwildlife-watching activities duringthe remainder of 2011. The fivewildlife-watching categories were:1. Active—a person who hadalready participated in 2011at the time of the screeninginterview.2. Avid—a person who had not yetparticipated in 2011, but in 2010had taken trips to participate inwildlife-watching activities for21 or more days or had spent$300 or more.3. Average—a person who had notyet participated in 2011, but in2010 had taken trips to wildlifewatch for less than 21 days andhad spent less than $300 ORhad not participated in wildlifewatchingactivities but was very4The sample cases selected due to high noncontact rateswere given the detailed sportsperson interview once.likely to in the remainder of2011.4. Infrequent—a person who hadnot participated in 2010 or2011, but was somewhat likelyor somewhat unlikely to participatein the remainder of 2011.5. Nonparticipant—a person whohad not participated in 2010 or2011 AND was very unlikely toparticipate during the remainderof 2011.Persons were selected for thedetailed sample based on thesegroupings, but persons in thenonparticipant group were noteligible for a detailed interview.A subsample of each of the othergroups was selected to receivea detailed interview with thechance of selection diminishingas the likelihood of participationdiminished. Wildlife-watchingparticipants were given the detailedinterview twice. 5 Some receivedtheir first detailed interview atthe same time as the screeninginterview (in April, May, or June2011). The rest received their firstdetailed interview in Septemberor October 2011. All wildlifewatchingparticipants receivedtheir second interview in Januaryor February 2012. Some respondentswere given the screener anddetailed interview in February,March, April, or May 2012. About13,900 persons were designated forinterviews in the United States. Thedetailed wildlife-watching samplesizes varied by state to get reliablestate-level estimates. During eachinterview period, about 33 percentof the designated persons were notfound at home or were unavailablefor some other reason. Overall,about 9,300 detailed wildlifewatcher interviews were completedat a response rate of 67 percent.ESTIMATION PROCEDURESeveral stages of adjustments wereused to derive the final 2011 FHWARperson weights. A brief description ofthe major components of the weights isgiven below. All statistics for the popu-5The sample cases selected due to high noncontact rateswere given the detailed wildlife-watching interviewonce.U.S. Fish and Wildlife Service and U.S. Census Bureau 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation 121