2.1. Experimental Design
MAY
A single-blind, sham-controlled, randomized parallel study investigating the impact of a cognitive intervention on the aversive response to a meal was conducted from January to May 2023.Participants were informed that the study aimed to assess how meal composition influenced their eating experience, and that various hummus recipes with different ingredients would be tested. Participants were randomly assigned to the cognitive intervention group or the control group by means of a computerized random sequence generator. First, both groups underwent aversive conditioning, and, subsequently, the effects of the cognitive intervention were compared to a sham intervention. The research adhered to the Declaration of Helsinki and was conducted in accordance with a preapproved protocol by the Vall d’Hebron Institutional Review Board (Comitè d’Ètica d’Investigació Clinica, Vall d’Hebron Institut de Recerca; protocol PR(AG)338/2016N approved on 28 October 2016, and revised on 19 February 2021), and all were informed and provided consent before the commencement of any study procedures. ClinicalTrials.gov registration number NCT05897411.