Response rates by wave and instrument

Waves 1-6 instrument response
  B cohort K cohort
  Eligible (b) Actual (c) % Eligible (b) Actual (c) %
Wave 1 Instrument (a)
F2F 5,107 5,107 100 4,983 4,983 100
P1L 5,107 4,341 85 4,983 4,229 85
P2L 4,630 3,696 80 4,286 3,388 79
TUD 1 5,107 4,031 79 4,983 3,867 78
TUD 2 5,107 3,751 73 4,983 3,582 72
AI N/A N/A N/A 4,983 4,880 98
PPVT N/A N/A N/A 4,983 4,382 88
HBC 788 342 43 N/A N/A N/A
CBC 436 233 53 N/A N/A N/A
TQ N/A N/A N/A 4,761 3,276 69
AEDC N/A N/A N/A 1,366 720 53
W1.5 5,061 3,573 71 4,935 3,594 73
Wave 2 Instrument (a)
F2F (d) 5,107 4,606 90 4,983 4,464 90
P1D 4,606 4,504 98 4,464 4,358 98
P1L 4,606 3,536 77 4,464 3,495 78
P2L 4,099 3,128 76 3,804 2,949 78
TUD 1 4,606 3,477 75 4,464 3,446 77
TUD 2 4,606 3,459 75 4,464 3,460 78
PPVT N/A N/A N/A 4,464 4,409 99
MR N/A N/A N/A 4,464 4,402 99
PLE Mail-out 400 96 24 612 199 33
HBC 791 533 67 N/A N/A N/A
CBC 1,672 1,144 68 N/A N/A N/A
TQ N/A N/A N/A 4,447 3,632 82
W2.5 5,107 3,246 64 4,983 3,252 65
Wave 3 Instrument (a)
F2F (d) 5,107 4,386 86 4,983 4,331 87
P1D 4,386 3,831 87 4,331 3,807 88
P2L 3,900 2,753 71 3,707 2,680 72
TUD1 4,386 2,959 67 4,331 2,961 68
TUD2 4,386 2,950 67 4,331 2,963 68
PPVT 4,386 4,266 97 4,331 4,273 99
WAI 4,386 4,197 96 N/A N/A N/A
MR N/A N/A N/A 4,331 4,270 99
PLE CATI 346 272 77 510 403 79
TQ 4,114 3,395 83 4,275 3,643 85
Wave 4 Instrument (a)
F2F (d) 5,107 4,242 82 4,983 4,164 84
CASI 4,242 4,210 99 4,164 4,116 99
P2L 3,706 2,677 72 3,512 2,645 75
CSR 4,242 4,181 99 N/A N/A N/A
ACASI N/A N/A N/A 4,169* 4,094 99
TUD N/A N/A N/A 4,169* 3,994 96
PPVT 4,242 4,185 99 N/A N/A N/A
MR 4,242 4,180 99 4,169* 4,103 99
PLE CATI 439 377 86 572 493 86
TQ 4,143 3,427 83 4,025 3,352 83
Wave 5 Instrument (a)
F2F (d) 5,107 4,085 80 4,983 3,956 79
CASI 4,077 4,010 98 3,952 3,857 98
P2L 3,512 2,444 70 3,277 2,333 71
CSR 4,026* 4,014 100 3,872 3,850 99
ACASI N/A N/A N/A 3,873* 3,844 99
TUD N/A N/A N/A 3,871* 3,649 94
PPVT 4,026 3,977 99 N/A N/A N/A
MR 4,027 3,985 99 N/A N/A N/A
PLE CATI 537 404 75 614 464 76
TQ 4,021 3,490 87 3,857 3,225 84
Wave 6 Instrument (a)
F2F (d) 5,107 3,764 74 4,983 3,537 71
CASI 3,759 3,668 98 3,526 3,376 96
P2L 3,197 2,311 72 2,904 2,212 76
CSR N/A N/A N/A 3388 3,317 98
ACASI 3,648* 3,597 99 3,386* 3,313 98
TUD 3,649* 3,460 95 3,387* 3,071 91
EXEC N/A N/A N/A 3,386* 3,333 98
PPVT N/A N/A N/A 3,386* 3,281 97
MR 3,648* 3,585 98 N/A N/A N/A
PLE CATI 559 398 71 554 420 76
TQ 3,678 3,102 84 3,422 2,698 79

Notes: * Represents instances where a child interview was completed and the main interview with the parents was not. Specifically, in Wave 4 there were five cases (K cohort). In Wave 5 there were eight cases for the K cohort and four cases for the B cohort. In Wave 6 there were eleven cases for the K cohort and four cases for the B cohort. N/A = Not administered
a Questionnaire acronyms are detailed above in section 3, Table 1: Data collection modes by wave.
b "Eligible" means the number of LSAC children for whom a questionnaire was applicable (e.g. children are eligible for a HBC questionnaire if the child’s main care is attended for 8 hours or more per week and this is home-based care).
c "Actual" means the number of respondents for whom a form was returned. d Response rates for Waves 2 to 6 as a proportion of Wave 1 families.

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