NAEP Technical DocumentationTreatment of Items in the Scaling of the 2015 Science Scales

Items deleted from the final scaling, science combined national and state assessment, by grade and block: 2015
Grade	Block	Item	Reason for decision
4	S4	K079802	Poor fit
	S5	K081901	Poor fit
	S8	K079901	Poor fit
	S9	K088701	Poor fit
8	S3	K113601	Poor fit
	S3	K113602	Poor fit
	S7	K110301	Poor fit
	S9	K115302	Poor fit
12	S3	K132201	Poor fit
	S4	K128402	Poor fit
	S7	K136601	Poor fit
	S12	K132901	Poor fit
	S12	K127402	Poor fit
	S13	K127001	Poor fit
	S13	K141301	Poor fit
NOTE: Univariate scale. The univariate scale was introduced in science starting in 2009. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Cluster items created for final scaling, science combined national and state assessment, by grade and block: 2015
Grade	Block	Item	Reason for decision	Items contributing to cluster
4	S5	K0855CL	Created by test development	K085501, K085502, K085503, K085504, K085505, K085506
	S6	K0869CL	Created by test development	K086901, K086902, K086903, K086904
	S7	K1597CL	Created by test development	K159701, K159702
	S8	K1097CL	Created by test development	K109701, K109702, K109703
	S9	K1537CL	Created by test development	K153701, K153702
	S10	K0829CL	Created by test development	K082901, K082902, K082903
	S11	K1633CL	Created by test development	K163301, K163302, K163303
8	S7	K1107CL	Created by test development	K110701, K110702, K110703
	S7	K1210CL	Created by test development	K121002, K121003
	S9	K1560CL	Created by test development	K156001, K156002, K156003, K156004, K156005, K156006
12	S3	K1572CL	Created by test development	K157201, K157202
	S6	K1582CL	Created by test development	K158201, K158202, K158203, K158204
	S8	K1584CL	Created by test development	K158401, K158402
	S9	K1776CL	Created by test development	K177601, K177602
	S13	K1587CL	Created by test development	K158701, K158702
NOTE: Univariate scale. The univariate scale was introduced in science starting in 2009. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Recoding of polytomous items for scaling, science combined national and state assessment, by grade and block: 2015
Grade	Block	Item	Reason for decision	Disposition
4	S3	K153102	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,0,1
	S4	K079501	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,2
	S5	K0855CL	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,0,1,2,3
	S9	K088302	Poor fit	Collapse categories: 0,,1,2 becomes: 0,1,1
	S11	K1603CL	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,0,1
8	S4	K122402	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	S7	K1107CL	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,2,3,3
	S7	K121001	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,2
	S9	K124102	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	S9	K1560CL	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	S10	K172101	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	S10	K167601	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,1
	S12	K123301	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	S12	K112601	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,2
12	S3	K133301	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,0,1,2,2
	S3	K1572CL	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,2,2
	S3	K126303	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,3
	S3	K126304	Poor fit	Collapse categories: 0,1,2 becomes 0,1,1
	S4	K133801	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,2
	S4	K157901	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	S4	K144401	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	S5	K131001	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,1
	S5	K130301	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	S5	K158001	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,1
	S6	K139801	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	S7	K136103	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,1
	S8	K1584CL	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,1
	S8	K137651	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,0,1,2,3
	S9	K1776CL	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,2,2
	S10	K179701	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	S10	K172501	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	S11	K127701	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	S11	K141701	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,1
	S12	K130001	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,2
NOTE: Univariate scale. The univariate scale was introduced in science starting in 2009. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Items scaled separately, science combined national and state assessment, by grade and block: 2015
Grade	Block	Item	Type
4	S3	K080502	Multiple choice
	S3	K080601	Multiple choice
	S4	K153301	Polytomously scored constructed-response
	S5	K081901	Multiple choice
	S5	K0855CL	Polytomously scored constructed-response
	S9	K088302	Polytomously scored constructed-response
	S10	K0829CL	Polytomously scored constructed-response
8	S3	K113701	Polytomously scored constructed-response
	S5	K121401	Multiple choice
	S6	K125401	Polytomously scored constructed-response
	S7	K123901	Polytomously scored constructed-response
	S8	K117201	Multiple choice
	S12	K119505	Polytomously scored constructed-response
	S12	K157001	Polytomously scored constructed-response
12	S3	K126303	Polytomously scored constructed-response
	S3	K132201	Multiple choice
	S5	K129701	Multiple choice
	S6	K135001	Polytomously scored constructed-response
	S6	K134503	Polytomously scored constructed-response
	S7	K136102	Polytomously scored constructed-response
	S8	K1584CL	Polytomously scored constructed-response
	S11	K127701	Polytomously scored constructed-response
	S11	K141701	Polytomously scored constructed-response
	S13	K141301	Multiple choice
NOTE: Univariate scale. The univariate scale was introduced in science starting in 2009. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Items deleted from the final scaling, science combined national and state assessment, by grade, subscale, and block: 2015
Grade	Subscale	Block	Item	Reason for decision
4	Physical science	S4	K079802	Poor fit
	Physical science	S5	K082101	Item dependence
	Life science	S8	K079901	Poor fit
8	Physical science	S3	K113601	Poor fit
	Physical science	S3	K113602	Poor fit
	Physical science	S7	K110301	Poor fit
	Physical science	S9	K115302	Poor fit
	Life science	S8	K112001	Item dependence
12	Physical science	S3	K132201	Poor fit
	Physical science	S4	K128402	Poor fit
	Physical science	S7	K136601	Poor fit
	Physical science	S13	K127001	Poor fit
	Physical science	S13	K141301	Poor fit
	Life science	S12	K127402	Poor fit
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Cluster items created for final scaling, science combined national and state assessment, by grade, subscale, and block: 2015
Grade	Subscale	Block	Item	Reason for decision	Items contributing to cluster
4	Earth and space sciences	S5	K0855CL	Created by test development	K085501, K085502, K085503, K085504, K085505, K085506
	Physical science	S6	K0869CL	Created by test development	K086901, K086902, K086903, K086904
	Earth and space sciences	S7	K1597CL	Created by test development	K159701, K159702
	Earth and space sciences	S8	K1097CL	Created by test development	K109701, K109702, K109703
	Life science	S9	K1537CL	Created by test development	K153701, K153702
	Life science	S10	K0829CL	Created by test development	K082901, K082902, K082903
	Earth and space sciences	S11	K1633CL	Created by test development	K163301, K163302, K163303
8	Earth and space sciences	S7	K1107CL	Created by test development	K110701, K110702, K110703
	Life science	S7	K1210CL	Created by test development	K121002, K121003
	Physical science	S9	K1560CL	Created by test development	K156001, K156002, K156003, K156004, K156005, K156006
12	Earth and space sciences	S3	K1572CL	Created by test development	K157201, K157202
	Physical science	S6	K1582CL	Created by test development	K158201, K158202, K158203, K158204
	Physical science	S8	K1584CL	Created by test development	K158401, K158402
	Earth and space sciences	S9	K1776CL	Created by test development	K177601, K177602
	Life science	S13	K1587CL	Created by test development	K158701, K158702
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Recoding of polytomous items for scaling, science combined national and state assessment, by grade, subscale, and block: 2015
Grade	Subscale	Block	Item	Reason for decision	Disposition
4	Life science	S3	K153102	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,0,1
4	Earth and space sciences	S11	K1603CL	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,0,1
8	Earth and space sciences	S7	K1107CL	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,2,3,3
	Life science	S7	K121001	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,2
	Earth and space sciences	S10	K167601	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,1
	Life science	S12	K123301	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	Life science	S12	K112601	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,2
12	Earth and space sciences	S3	K133301	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,0,1,2,2
	Life science	S3	K126304	Poor fit	Collapse categories: 0,1,2 becomes 0,1,1
	Physical science	S4	K133801	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,1,1,2,2
	Physical science	S4	K144401	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,2
	Physical science	S5	K131001	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,1
	Physical science	S5	K158001	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,1
	Life science	S6	K134503	Poor fit	Collapse categories: 0,1,2 becomes: 0,0,1
	Physical science	S7	K136103	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,1,1,1
	Earth and space sciences	S8	K137651	Poor fit	Collapse categories: 0,1,2,3,4 becomes: 0,0,1,2,3
	Life science	S10	K179701	Poor fit	Collapse categories: 0,1,2 becomes: 0,1,1
	Physical science	S12	K130001	Poor fit	Collapse categories: 0,1,2,3 becomes: 0,0,1,2
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Items scaled separately, science combined national and state assessment, by grade, subscale, and block: 2015
Grade	Subscale	Block	Item	Type
4	Earth and space sciences	S3	K080601	Multiple choice
	Life science	S4	K153301	Polytomously scored constructed-response
	Life science	S5	K081901	Multiple choice
	Earth and space sciences	S5	K0855CL	Polytomously scored constructed-response
	Life science	S9	K088301	Multiple choice
	Life science	S9	K088302	Polytomously scored constructed-response
8	Physical science	S5	K121401	Multiple choice
	Earth and space sciences	S5	K121701	Multiple choice
	Earth and space sciences	S6	K125401	Polytomously scored constructed-response
	Physical science	S7	K123901	Polytomously scored constructed-response
	Physical science	S12	K157001	Polytomously scored constructed-response
12	Physical science	S3	K132201	Multiple choice
	Earth and space sciences	S4	K157901	Polytomously scored constructed-response
	Earth and space sciences	S5	K130301	Polytomously scored constructed-response
	Life science	S6	K139801	Polytomously scored constructed-response
	Physical science	S7	K136102	Polytomously scored constructed-response
	Physical science	S11	K141701	Polytomously scored constructed-response
	Physical science	S13	K141301	Multiple choice
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2015 Science Assessment.

Last updated 17 November 2021 (ML)

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