Statistics for the Verbal Test of Pattern Recognition

Participant data

Histogram of scores

          x     x  x

 x  x  x  x  x  x  x  x

12 19 21 22 23 24 25 26

Histogram of ages

 x  x  x  x  x  x  x  x  x  x  x

16 20 21 26 29 35 38 44 49 55 64

Sex distribution

Male	Female
11	0

Country distribution

IT	US	BA	CN	ES	HR	JP	LT	TR
2	2	1	1	1	1	1	1	1

Date when taken

	FEB	MAR	MAY	JUN	AUG	SEP	NOV	DEC
2024	0	0	0	0	0	0	1	3
2025	1	1	1	1	1	2	0	0

Statistical summary

Sample information

N = 11

Lowest raw score = 12

Highest raw score = 26

Range = 15

Resolution = 2

Central tendency and dispersion

Mean = 22.09

Median = 23

Raw score standard deviation = 3.73

Quartile deviation = 1.5

Standard error of measurement = 1.39 raw score points

Distribution shape

Skewness = -1.91

Excess Kurtosis = 4.35

Test difficulty

Sample-dependent Hardness = 0.12

Sample-independent Hardness = 0.15

Items solved by all = 10

Items solved by none = 0

Reliability

Cronbach's alpha = 0.8619

Split Half Reliability Index = 0.8053

Spearman–Brown corrected = 0.8921

McDonald's omega = 0.883

Test dimensionality = essential unidimensionality

Item quality analysis

Overall discrimination = 0.5436

Designation	Discrimination index	Number of items
Excellent	≥0.7	5
Very Good	0.6–0.6999	3
Good	0.5–0.5999	3
Acceptable	0.4–0.4999	1
Borderline	0.3–0.3999	1
Poor	0.2–0.2999	1
Nonfunctional	≤0.1999	2
Insufficient data	NaN	10

You can find explanations about the discrimination computation here.

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Statistical report on the Verbal Test of Pattern Recognition