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Subsetting the questionnaire content

In Wave 1, the Innovation Panel tested the feasibility of using random subsets of questionnaire content. The purpose was to explore the possibility of maximising survey content while minimising overall questionnaire burden for respondents. Three areas were covered by random subsets asked of half the sample–the Partnership and Fertility Histories, Environmental Behaviour and Attitudes, and Self-reported Height and Weight.

In Wave 2, the other half of the sample was asked the Partnership and Fertility History, whilst the full sample received questions on environmental behaviour and attitudes and also self-reported height and weight.

In Waves 3 and 5 and Waves 5 and 6, this two-wave pattern for the environmental, height and weight topics was repeated to provide evidence on the effect of rotation schedule in content on the response process.

Within PSUs, households were randomly assigned to subsets. In each household, all responding adults received content consistent with their treatment.

The variable in the data which controls which subset of survey content the respondent received is A_GROUP2 on the record a_hhsamp_ip, then w_ff_group2 on w_hhsamp_ip where “w” indicates waves with values “B” through “F” for Waves 2 through 6 respectively.

The specific details of the sub-sets are as follows:

Environmental Behaviour and Attitudes

Group 1           Not asked the set of questions

Group 2           Asked this set of questions

The relevant items are a_opepplch, a_opeich, a_opecbn, a_opeflood, a_opeflduk, a_opefood, a_opefduk,and a_opecl30 on records a_indresp_ip.  At Waves 2 and 3, the effected questions were w_envhabit1_a through w_envhabit11_b, w_opecl30 and w_opecl200 on record w_indresp_ip where “w” indicates waves and takes values “b” and “c” for waves 2 and 3 respectively.  At Waves 4, 5, and 6 the effected questions were  w_envhabit1 through w_envhabit11, w_opecl30 and w_opecl200 on record w_indresp_ip where “w” takes values “D”, “E” and “F”.

Height and Weight

Group 1           Not asked the set of questions

Group 2           Asked this set of questions

The relevant items are w_hlht, w_hlhtf, w_hlhti, w_hlhtc, w_hlwt, w_hlwts, w_hlwtp, w_hlwtk, w_hlwte, w_hlwtl, and w_hlpreg on record w_indresp_ip were “w” indicates waves and takes values “A”, “B”, “C”, “D”, “E”, or “F”..

Partnership and Fertility History

Group 1           A “short-form” history

Group 2           The full life history

The list below shows the affected questions in the partnership and fertility history

subsets:

Table: Partnership and fertility history items

Group 1 (Short form history)Group 2 (Full History)
A_COH1BM on record A_INDRESP_IP A_COH1BY on record A_INDRESP_IP A_CH1BM on record A_INDRESP_IP A_CH1BY4 on record A_INDRESP_IPA_LCMCOH on record A_INDRESP_IP A_LCMCBM on record A_INDRESP_IP A_LCMCBY4 on record A_INDRESP_IP A_LCMSPM on record A_INDRESP_IP A_LCMSPY4 on record A_INDRESP_IP A_PMARINT on record A_INDRESP_IP A_LMARM on record A_MARRIAGE_IP A_LMARY4 on record A_MARRAIGE_IP A_LMCOH on record A_MARRIAGE_IP A_LMCBM on record A_MARRIAGE_IP A_LMCBY4 on record A_MARRIAGE_IP A_LMEND on record A_MARRIAGE _IP A_LMWWM on record A_MARRIAGE_IP A_LMWWY4 on record A_MARRIAGE_IP A_LSPWWD on record A_MARRIAGE_IP A_LMDVM on record A_MARRIAGE_IP A_LMSPY4 on record A_MARRIAGE_IP A_LNCOH on record A_INDRESP_IP A_LCSBM on record A_COHAB_IP A_LCSBY4 on record A_COHAB_IP A_LCSEM on record A_COHAB_IP A_LCSEY4 on record A_COHAB_IP A_LADOPT on record A_INDRESP_IP A_LNADOPT on record A_INDRESP_IP A_LACBD which is not released A_LACBM on record A_ADOPT_IP A_LACBY4 on record A_ADOPT_IP A_LACSX on record A_ADOPT_IP A_LASCST on record A_ADOPT_IP A_LACYB4 on record A_ADOPT_IP A_LACLV on record A_ADOPT_ip A_LACNO on record A_ADOPT_IP A_LACAL on record A_ADOPT_IP A_LACYD4 on record A_ADOPT_IP A_LCHLV on record A_NATCHILD_IP A_LCHYD4 on record A_NATCHILD_IP A_LCHSX on record A_NATCHILD_IP A_LCHDOBY on record A_NATCHILD_IP A_LCHDOBM on record A_NATCHILD_IP A_LCHBD which is not released A_LCHAL on record A_NATCHILD_IP A_LCHNO on record A_NATCHILD_IP A_LCHCHK on record A_NATCHILD_IP A_BWTXP on record A_NATCHILD_IP A_BWTEL on record A_NATCHILD_IP A_BWTWK on record A_NATCHILD_IP A_BWT on record A_NATCHILD_IP A_BWTLB on record A_NATCHILD_IP A_BWTOZ on record A_NATCHILD_IP A_BWTK on record A_NATCHILD_IP A_BWTG5 on record A_NATCHILD_IP A_LCHMOR on record A_INDRESP_IP A_LCHMORN on record A_INDRESP_IP

In Wave 2, both groups were asked the “long-form” partnership and fertility history items. These items include:

B_LCMCOH on record B_INDRESP_IPList continued
B_LCMCBM on record B_INDRESP_IPB_LACNO on record B_ADOPT_IP
B_LCMCBY4 on record B_INDRESP_IPB_LACAL on record B_ADOPT_IP
B_LCMSPM on record B_INDRESP_IPB_LACYD4 on record B_ADOPT_IP
B_LCMSPY4 on record B_INDRESP_IPB_LCHLV on record B_NATCHILD_IP
B_PMARINT on record B_INDRESP_IPB_LCHYD4 on record B_NATCHILD_IP
B_LMARM on record B_MARRIAGE_IPB_LCHSX on record B_NATCHILD_IP
B_LMARY4 on record B_MARRIAGE_IPB_LCHDOBY on record B_NATCHILD_IP
B_LMCOH on record B_MARRIAGE_IPB_LCHDOBM on record B_NATCHILD_IP
B_LMCBM on record B_MARRIAGE_IPB_LCHBD which is not released
B_LMCBY4 on record B_MARRIAGE_IPB_LCHAL on record B_NATCHILD_IP
B_LMEND on record B_MARRIAGE _IPB_LCHNO on record B_NATCHILD_IP
B_LMWWM on record B_MARRIAGE_IPB_LCHCHK on record B_NATCHILD_IP
B_LMWWY4 on record B_MARRIAGE_IPB_BWTXP on record B_NATCHILD_IP
B_LSPWWD on record B_MARRIAGE_IPB_BWTEL on record B_NATCHILD_IP
B_LMDVM on record B_MARRIAGE_IPB_BWTWK on record B_NATCHILD_IP
B_LMSPY4 on record B_MARRIAGE_IPB_BWT on record B_NATCHILD_IP
B_LNCOH on record B_INDRESP_IPB_BWTLB on record B_NATCHILD_IP
B_LCSBM on record B_COHAB_IPB_BWTOZ on record B_NATCHILD_IP
B_LCSBY4 on record B_COHAB_IPB_BWTK on record B_NATCHILD_IP
B_LCSEM on record B_COHAB_IPB_BWTG5 on record B_NATCHILD_IP
B_LCSEY4 on record B_COHAB_IPB_BRFED on record B_NATCHILD_IP
B_LADOPT on record B_INDRESP_IPB_BRFEDEND on record B_NATCHILD_IP
B_LNADOPT on record B_INDRESP_IPB_BRFEDEND2 on record B_NATCHILD_IP
B_LACBD which is not releasedB_LCHMOR on record B_INDRESP_IP
B_LACBM on record B_ADOPT_IPB_LCHMORN on record B_INDRESP_IP
B_LACBY4 on record B_ADOPT_IP 
B_LACSX on record B_ADOPT_IP 
B_LASCST on record B_ADOPT_IP 
B_LACYB4 on record B_ADOPT_IP 
B_LACLV on record B_ADOPT_IP 

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