PERSONAL IMPULSIVITY MEDIATES THE EFFECTS OF NEUROMODULATION IN ECONOMIC INTERTEMPORAL CHOICES: A PILOT STUDY

• Authors: Colombo Barbara , Iannello Paola , Puglisi Gugliemo , Antonietti Alessandro
• Languages of publication: EN

Abstracts

EN

The involvement of the prefrontal cortex in intertemporal choices has been long recognized. Using neurostimulation techniques, recent studies have indicated that the left dorsolateral prefrontal cortex (DLPFC) influences performance on intertemporal choice tasks. The present pilot study is aimed to explore further the DLPFC’s role in intertemporal choices by assessing the influence of individual levels of impulsivity on modulating the stimulation’s effects. Thirteen subjects participated in a within-subjects experiment. During the three sessions, participants received 20 minutes of transcranial direct current stimulation (tDCS; either sham, anodal, or cathodal) and were administered the Intertemporal Choice Task. Then, they completed the Barratt Impulsivity Scale and the Dickman Impulsivity Inventory. Using a repeated-measure generalized linear model, we explored the effects of stimulation on intertemporal choice (either immediate or delayed reward) on impulsive responses, defined as quick answers. The individual level of impulsivity was included in the model as a covariate. According to the results, participants made a greater number of impulsive choices favouring immediate rewards after cathodal stimulation of the left DLPFC. Additionally, a moderating role of individual impulsivity emerged. This study provides support for the involvement of the left DLPFC in intertemporal choices. We contend that the role of individual differences should be further explored to obtain a better understanding of intertemporal choice behaviour.

Keywords

EN

INTERTEMPORAL CHOICE; NEUROMODULATION; TRANSCRANIAL DIRECT CURRENT STIMULATION; IMPULSIVITY; DELAY DISCOUNTING

• Publisher: Institute of Experimental Psychology, Slovak Academy of Sciences
• Journal: Studia Psychologica
• Year: 2020
• Volume: 62
• Issue: 2
• Pages: 123 – 137

Contributors

author

Colombo Barbara

• Neuroscience Lab, Champlain College, 163 South Willard Street, Burlington, 05401 VT, USA

author

Iannello Paola

author

Puglisi Gugliemo

author

Antonietti Alessandro

Identifiers

DOI

https://doi.org/10.31577/sp.2020.02.795