Table 4 List of outcome measures

From: BRAINSTORMING: A study protocol for a randomised double-blind clinical trial to assess the impact of concurrent brain stimulation (tDCS) and working memory training on cognitive performance in Acquired Brain Injury (ABI)

TASK DESCRIPTION Target functions
Simple Reaction Time Respond to each stimulus, with varying response-stimulus intervals. Vigilance
Go/No-Go It employs a continuous stream of two different stimuli for which a binary decision must be made, such that one stimulus type requires a response (go) and the other stimulus type requires the participant to withhold a response (no-go). Executive control
2-Choice Reaction Time Indicate the colour of each stimulus (2-choice responses; 50% each choice). Vigilance
Dual task Complete the 2-choice reaction time task while silently counting the number of each colour of stimuli presented. Count probe for one colour at the end of each set. Executive control
Flanker A central target stimulus is presented with flanking stimuli (flankers) on two sides that are either the same as (congruent) or different than (incongruent) the central target stimulus. The participant must decide and respond regarding a feature of the central stimulus (e.g., red or black) while ignoring/filtering the flanking stimuli. Executive control
Item Working memory Indicate whether a probe item was present or absent in a preceding study set of 2–6 items (50% present). Working memory
Location working memory Indicate whether a probe item was present or absent in the same position in a preceding study set of 2–6 locations (50% present). Working memory
Visual search Locate and indicate orientation (upright vs. inverted; 50% each) of a target among different shape distractors that are a different colour (feature search) or the same colour (conjunction search) as the target. Orienting and Selection
Fixed visuo-spatial n-back task Participants must attend to a visual stream of information that is presented sequentially and look for matches, pressing a button upon seeing a “match”. Three levels of difficulty will be used (n = 1,2,3) Working memory