Table 1.

Individual test descriptions and measured function of Behavioral Assessment and Research Systems.

Neurobehavioral Test	Function Measured	Brief Test Description	Outcome Variables
Continuous Performance Test (CPT)	Sustained visual attention	Press key when a certain target is presented, but do not press key when other stimuli are presented.	Correct response fraction, d prime, false alarm fraction, false latency, hit fraction
Digit Span (DST)	Attention, memory	Press the numbers shown on the screen in the same order or reverse order. Number of digits increases until failure criterion is met.	Forward count, reverse count
Match-to-Sample (MTS)	Visual memory	Matrix of blocks is displayed with 3 matrices below Participant matrix that matches the above matrix.	Average correct latency, number of correct responses
Symbol Digit (SDT)	Executive function, coding	Digits are paired with symbols in a matrix. Matrix at bottom has symbols but no digits. Participant types correct numbers that correspond with the symbols.	Average correct latency, total errors
Simple Reaction Time (SRT)	Response speed	Press button as quickly as possible after seeing a stimulus.	Average correct latency, total number of errors
Tapping (TAP)	Response speed, coordination	Press button(s) as rapidly as possible using index finger of one or both hands on 1 or 2 buttons	Alternative hands average number of taps, average number of taps with preferred hand
Progressive Ratio Test (PRT)	Effort-related motivation	Tap 10 times to receive a reward (smiling face). Then tap 20 times to get the reward, and then 30 times, etc.	Total taps