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Fourth National Incidence Study of Child Abuse and Neglect (NIS–4)

Fourth National Incidence Study of Child Abuse and Neglect (NIS–4)

Fourth National Incidence Study of Child Abuse and Neglect (NIS–4)

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Table A–2.NIS–4 Agency Participation, Numbers <strong>and</strong> RatesAgency categoryIn-scopeoriginalagenciesAgenciesParticipa-tingoriginalagenciesIn-scopereplacementsforrefusalsTotalparticipatingagencies 1UnweightedCooperationRate 2Unweightedparticipationrate beforereplacement 3RatesWeightedparticipationrate beforereplacementUnweightedparticipationrate afterreplacement 4Weightedparticipationrate afterreplacement 4SamplesizeA B C D E F=E/(B+D) G=C/B G (wtd) H=E/B H(wtd)County Sheriff/State Police 71 58 44 0 44 76 76 88 76 88Juvenile Probation 65 65 54 0 54 83 83 88 83 88Municipal Police 83 81 55 17 63 64 68 76 78 88Hospitals 159 152 104 1 105 69 68 81 69 81Public Health 117 106 82 0 82 77 77 82 77 82Social Service/Mental Hlth 106 88 60 0 60 68 68 64 68 64Shelters 95 83 69 2 71 84 83 76 86 78Day Care 240 217 170 11 176 77 78 78 81 81Schools 670 657 336 190 423 50 51 54 64 70Public Housing 73 17 16 0 16 94 94 100 94 100Total 1,679 1,524 990 221 1,094 63 65 68 72 781 This column includes all in-scope agencies (both from the original sample or replacement sample) that participated for all or part <strong>of</strong> the reference period.2 The formula used for this column computes the percentage <strong>of</strong> all participating agencies <strong>of</strong> all eligible agencies targeted for recruitment, including replacements in both the numerator <strong>and</strong> denominator. This is defined by the American Association for Public Opinion Research (AAPOR) as formula COOP4. See AAPOR’s St<strong>and</strong>ard Definitions (2006). Available online at http://www.aapor.org/uploads/st<strong>and</strong>arddefs_4.pdf, p.34. 3 The formula used for this column is based solely on the eligible agencies in the original sample, disregarding replacements. Also known as the “effective participation rate,” it isequivalent to AAPOR formula RR6 (Ibid., p33). 4 This is equivalent to the “after replacement” participation rate measure used in the <strong>National</strong> Assessment <strong>of</strong> Educational Progress (NAEP), an example <strong>of</strong> which can be seen athttp://nationsreportcard.gov/science_2005/s0117.asp?printver= A-12

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