Skip to main content


Table 2 Specific information to be recorded for every study included in the review. For studies that compare performance between two or more groups of participants, the sample characteristics will be recorded for each group separately. For continuous variables (e.g. age, level of substance use engagement), the mean, standard deviation, and range will be recorded. For discrete or categorical data (e.g. gender, diagnoses, treatment status), the number of participants in the sample who fall into each classification will be recorded

From: Effects of neuromodulation on cognitive performance in individuals exhibiting addictive behaviour: a systematic review protocol

Information type Details to be recorded
Sample characteristics Age
SUAD diagnoses (if applicable); years of diagnosis
Level of substance use or behaviour engagement/severity (e.g. number of cigarettes smoked per day; score on validated measure of addictive behaviour)
Treatment status (number of participants in inpatient or outpatient treatment, seeking treatment, not seeking treatment)
Substance use abstinence period before study; requirement to refrain from use before study
Neuromodulation parameters Type of neuromodulation (i.e. tDCS, TMS); stimulation pattern/frequency for TMS (i.e. single-pulse, repetitive, theta-burst, patterned)
Position of stimulating electrodes (tDCS) or coil (TMS)
Stimulation intensity
Stimulation duration
Stimulation frequency (for tDCS and repetitive TMS)
Number of sessions of stimulation; interval between sessions (if repeated sessions)
Number of pulses; duration of stimulation trains and inter-train intervals (TMS)
Electrode sizes (tDCS); coil type (TMS)
Inclusion and details of sham condition
Experimental design Within-subject or between-subject comparisons
Single- or double-blind
Type of control condition (e.g. sham stimulation; control group; control task)
Online or offline delivery of neuromodulation (relative to cognitive task)
Measure of cognitive function Cognitive task/paradigm
Cognitive function(s) being measured
Description of stimulus/cue type (if appropriate)
Number of trials; task length
Counterbalancing/order of conditions (if appropriate)
Time of task relative to stimulation
Results Descriptive statistics for condition/group means
Test statistics for condition/group comparisons
P values for condition/group comparisons
Effect sizes for condition/group comparisons
95% confidence intervals for condition/group comparisons