Text Descriptions and data tables for the body of the document
Reliability and Validity of the DRDP access:
Results of the 2005-2006 Calibration Study

Figure 1 Description. Map showing the relationship of the three sets of subscales to the 48 Measures on the DRDP access.

OSEP Outcomes	Desired Results	Indicator Groups	Measures
Positive social-emotional skills	Children are personally and socially competent	Self-Concept and Social and Interpersonal Skills	1	Identity of Self
			2	Recognition of Own Skills and Accomplishments
			3	Self-Expression
			4	Expressions of Empathy
			5	Interactions with Adults
			6	Relationships with Familiar Adults
			7	Developing Friendships
			8	Building Cooperative Play with Other Children
			9	Conflict Negotiation
			10	Awareness of Diversity
		Self-Regulation	11	Impulse Control
			12	Seeking Other’s Help to Regulate Self
			13	Responsiveness to Other’s Support
			14	Self-Comforting
			15	Taking Turns
Knowledge and skills		Language	16	Language Comprehension
			17	Responsiveness to Language
			18	Expresses Self Through Language
			19	Uses Language in Conversation
	Children are effective learners	Learning and Cognitive Competence	20	Curiosity and Initiative
			21	Attention Maintenance and Persistence
			22	Memory
			23	Cause and Effect
			24	Engages in Problem-Solving
			25	Object and Pretend Play
		Math	26	Number Sense: Understands Quantity and Counting
			27	Number Sense: Math Operations
			28	Number Sense: Comparison and Quantity
			29	Shapes
			30	Time
			31	Classification and Matching
			32	Measurement
			33	Patterning
		Literacy	34	Interest in Literacy
			35	Concepts of Print
			36	Letter and Word Knowledge
			37	Phonological Awareness
			38	Emerging Writing
			39	Comprehension of Text
Action to meet needs	Children show physical and motor competence	Motor Skills	40	Movement
			41	Balance
			42	Grasp/Release and Manipulation
			43	Eye-Hand Coordination
	Children are safe and healthy	Safety and Health	44	Personal Care Routines: Toileting and Hygiene
			45	Personal Care Routines: Dressing
			46	Personal Care Routines: Self-Feeding
			47	Personal Safety
			48	Understanding Healthy Lifestyle: Eating and Nutrition

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Figure 2 Description. The item characteristic curve for an item with a difficulty of 0.

This relationship between item difficulty, person ability, and probability of passing an item can be represented with a line graph that has the person’s ability on the x-axis and the probability of passing the item on the y axis. As a person’s ability increases along the x-axis, the probability of passing the item also increases. The rate at which the probability of passing an item increases with increses of ability changes across the range of ability. At ability levels far from the difficulty of the item (higher or lower) the rate of growth is relatively flat. At abilities level close to the difficulty of the item the rate of growth is steeper. The difficulty of the item represented in in Figure 2 is 0. The figure shows that the rate of growth is steepest close to an ability score of 0.

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Figure 3 Description. Eigenvalues for each of the eight Indicator Groups.

Self-Concept and Social and Interpersonal Skills
simulated	observed
1.170878204	7.963105272
1.124459606	0.381287182
1.088288172	0.305673539
1.044666769	0.247561897
1.013598039	0.216264723
0.979509826	0.212246977
0.950112071	0.194928497
0.915525631	0.184798203
0.876979506	0.150435481
0.835982176	0.143698229

Self-Regulation
simulated	observed
1.087217453	3.908467166
1.040670752	0.381855923
1.003178637	0.276880901
0.962406207	0.24257892
0.906526951	0.190217091

Language
simulated	observed
1.076136392	3.575722159
1.020652345	0.206107633
0.978222897	0.123688435
0.924988367	0.094481773

Learning and Cognitive Competence
simulated	observed
1.112914572	5.03073545
1.058097931	0.246843093
1.018247797	0.22539408
0.97991942	0.207672842
0.940033145	0.156597018
0.890787135	0.132757517

Math
simulated	observed
1.139257881	6.231339768
1.090742745	0.406121893
1.050504735	0.351420635
1.018926145	0.282198218
0.979399051	0.218809186
0.947026684	0.19531578
0.910390433	0.174681762
0.863752327	0.140112758

Literacy
simulated	observed
1.111601361	4.759245771
1.056379375	0.33116686
1.018652802	0.284883784
0.980105909	0.274418237
0.941782115	0.197166837
0.891478439	0.15311851

Motor Skills
simulated	observed
1.076060755	3.552952762
1.021467367	0.237754059
0.978813212	0.114528126
0.923658665	0.094765053

Safety and Health
simulated	observed
1.087764827	3.846308274
1.040449333	0.534933731
0.998286485	0.271827155
0.962988824	0.201231027
0.910510531	0.145699813

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Figure 4 Description. Weighted mean square for each of the Measures on the DRDP access.

Note. Indicator 1 = Self-Concept and Social and Interpersonal Skills; Indicator 2 = Self-Regulation; Indicator 3 = Language; Indicator 4 = Learning and Cognitive Competence; Indicator 5 = Math; Indicator 6 = Literacy; Indicator 7 = Motor Skills; and Indicator 8 = Safety and Health.

Item Difficulty			Weighted MS
Outcome 1: Desired Result 1: Indicator 1	1 Identity of Self	-0.647	0.84
	2 Recognition of Own Skills and Accomplishments	-0.721	0.91
	3 Self-Expression	-0.498	0.89
	4 Expressions of Empathy	0.921	1.03
	5 Interactions with Adults	-1.200	0.85
	6 Relationships with Familiar Adults	-0.899	0.88
	7 Developing Friendships	-0.364	0.89
	8 Building Cooperative Play with Other Children	0.155	1.01
	9 Conflict Negotiation	0.819	0.77
	10 Awareness of Diversity	0.570	0.79
Indicator 2	11 Impulse Control	-0.433	1.07
	12 Seeking Other’s Help to Regulate Self	-1.803	0.96
	13 Responsiveness to Other’s Support	-0.704	0.91
	14 Self-Comforting	-0.666	1.21
	15 Taking Turns	0.730	0.84
Outcome 2: Desired Result 1: Indicator 3	16 Language Comprehension	-0.874	0.94
	17 Responsiveness to Language	-0.578	0.81
	18 Expresses Self Through Language	-0.419	0.77
	19 Uses Language in Conversation	0.168	0.77
Desired Result 2: Indicator 4	20 Curiosity and Initiative	-0.340	0.85
	21 Attention Maintenance and Persistence	-0.092	1.07
	22 Memory	-0.348	0.77
	23 Cause and Effect	-0.577	0.88
	24 Engages in Problem Solving	-0.255	0.89
	25 Object and Pretend Play	-0.292	0.92
Indicator 5	26 Understands Quantity and Counting	0.708	0.92
	27 Math Operations	1.613	0.89
	28 Comparison of Quantity	1.324	0.74
	29 Shapes	0.826	0.73
	30 Time	0.249	0.84
	31 Classification and Matching	1.836	0.89
	32 Measurement	1.574	0.89
	33 Patterning	0.441	0.81
Indicator 6	34 Interest in Literacy	0.250	1.05
	35 Concepts of Print	1.222	0.66
	36 Letter and Word Knowledge	0.298	0.9
	37 Phonological Awareness	1.459	0.96
	38 Emerging Writing	0.934	0.92
	39 Comprehension of Text	1.408	0.75
Outcome 3: Desired Result 3: Indicator 7	40 Movement	-1.264	0.98
	41 Balance	-1.259	0.99
	42 Grasp/Release and Manipulation	-0.700	0.77
	43 Eye-Hand Coordination	-0.943	0.85
Outcome 3: Desired Result 4: Indicator 8	44 Toileting and Hygiene	-0.147	0.77
	45 Dressing	-0.088	0.82
	46 Self-Feeding	-1.156	0.79
	47 Personal Safety	0.314	0.8
	48 Eating and Nutrition	-0.551	1.45

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Desired Results access Project

For Assessors

Text Descriptions and data tables for the body of the document
Reliability and Validity of the DRDP access:
Results of the 2005-2006 Calibration Study

Figure 1 Description. Map showing the relationship of the three sets of subscales to the 48 Measures on the DRDP access.

Figure 2 Description. The item characteristic curve for an item with a difficulty of 0.

Figure 3 Description. Eigenvalues for each of the eight Indicator Groups.

Figure 4 Description. Weighted mean square for each of the Measures on the DRDP access.

Desired Results access Project

For Assessors

Text Descriptions and data tables for the body of the document Reliability and Validity of the DRDP access: Results of the 2005-2006 Calibration Study

Figure 1 Description. Map showing the relationship of the three sets of subscales to the 48 Measures on the DRDP access.

Figure 2 Description. The item characteristic curve for an item with a difficulty of 0.

Figure 3 Description. Eigenvalues for each of the eight Indicator Groups.

Figure 4 Description. Weighted mean square for each of the Measures on the DRDP access.

Text Descriptions and data tables for the body of the document
Reliability and Validity of the DRDP access:
Results of the 2005-2006 Calibration Study