Impulsivity and gambling: A complex clinical association across three measures

Area of Science:

• Neuroscience
• Psychology
• Clinical Psychiatry

Background:

• Gambling disorder (GD) is frequently conceptualized as an impulsive condition.
• Previous research on impulsivity in GD has yielded inconsistent findings, often dependent on the assessment methods used.
• Understanding the specific facets of impulsivity relevant to GD is crucial for effective clinical intervention.

Purpose of the Study:

• To investigate the clinical associations between three distinct measures of impulsivity and gambling disorder symptom severity.
• To compare the utility of the Eysenck Impulsiveness Questionnaire (EIQ), Barratt Impulsiveness Scale (BIS), and Stop-Signal Task (SST) in assessing impulsivity in individuals with GD.

Main Methods:

• One hundred fifty-four participants diagnosed with GD were assessed using at least one impulsivity measure (EIQ, BIS, SST) and gambling severity scales.
• Participants were categorized into high impulsivity (HI) and low impulsivity (LI) groups based on a mean split within each measure's domain.
• Clinical and demographic variables were compared between HI and LI groups.

Main Results:

• The motor impulsivity domain of the BIS demonstrated significant clinical differences between HI and LI groups.
• The attentional impulsivity domain of the BIS showed limited associations with clinical variables.
• No significant differences in gambling symptom severity were found between HI and LI groups for the SST and EIQ measures.

Conclusions:

• Impulsivity in gambling disorder is complex and measure-dependent.
• The motor impulsivity component of the BIS appears to be the most clinically relevant for predicting GD symptom severity.
• Sub-typing impulsivity is essential, as different facets may have varying clinical implications in GD.