Correction

This article refers to:

Cognition test battery: Adjusting for practice and stimulus set effects for varying administration intervals in high performing individuals

Article title: “Cognition test battery: Adjusting for practice and stimulus set effects for varying administration intervals in high performing individuals”

Author: Mathias Basner, Emanuel Hermosillo, Jad Nasrini, Salil Saxena, David F. Dinges, Tyler M. Moore and Ruben C. Gur

Journal: Journal of Clinical and Experimental Neuropsychology

DOI: 10.1080/13803395.2020.1773765

When the above article was first published online, the following items were published in error:

The figure caption for Figures 5 and 6 were switched.

Figure 5 caption should read as “Differences between stimulus sets in the speed domain. Significant differences in Cognition speed performance across the 15 test versions were found for four out of the 10 Cognition tests. Black dots represent estimated means relative to the overall mean across test administrations. Error bars reflect standard errors. MP: Motor Praxis; VOLT: Visual Object Learning Test; F2B: Fractal 2-Back; AM: Abstract Matching; LOT: Line Orientation Test; ERT: Emotion Recognition Test; MRT: Matrix Reasoning Test; DSST: Digit Symbol Substitution Test; BART: Balloon Analog Risk Test; PVT: Psychomotor Vigilance Test.”

Whereas, Figure 6 caption should read as “Differences between stimulus sets in the accuracy domain. Significant differences in Cognition accuracy performance across the 15 test versions were found for those six out of the 10 Cognition tests that have unique stimulus sets. Black dots represent estimated means relative to the overall mean across test administrations. Error bars reflect standard errors. MP: Motor Praxis; VOLT: Visual Object Learning Test; F2B: Fractal 2-Back; AM: Abstract Matching; LOT: Line Orientation Test; ERT: Emotion Recognition Test; MRT: Matrix Reasoning Test; DSST: Digit Symbol Substitution Test; BART: Balloon Analog Risk Test; PVT: Psychomotor Vigilance Test.”

The data for Ethnicity on Table 2 were shifted up by one line. The correct table can be found below:

Table 2. Subject characteristics and administration interval statistics*.

	Long Group ≥ 10 days	Short Group ≤ 5 days	Ultrashort Group 4x per day	All	Difference Between Groups p-value
Number of Subjects	15	16	15	46	N/A
Mean (Range) Administration Interval [days]	12.0 (10-28)	3.1 (2-5)	3.5 (2-7)	6.9 (2-28)	N/A
Mean (SD) Subject Age [years]	32.1 (7.3)	34.4 (6.9)	30.9 (7.5)	32.5 (7.2)	0.38^#
Male	53.3%	50.0%	46.7%	50.0%	1.00†
Ethnicity
White	66.7%	37.5%	60.0%	54.3%
Asian	26.7%	37.5%	6.7%	23.9%	0.13†
Black	0.0%	12.5%	26.7%	13.0%
Other/Unknown	6.7%	12.5%	6.7%	8.7%
Degree MD or PhD	13.3%	12.5%	20.0%	15.2%	0.88†

SD: Standard Deviation; *consecutive test days had to be separated by at least one test-free day; †Fisher’s Exact test; ^#Type-III test for fixed-effects; N/A not applicable.

This article is available both online and in print. The online version has been corrected.