Olfactory perception, and especially hedonic evaluation of odors, is highly flexible, but some mechanisms involved in this flexibility remain to be elucidated. In the present study we aimed at better understanding how repeated exposure to odors can affect their pleasantness. We tested the hypothesis of an affective habituation to the stimuli, namely a decrease of emotional intensity over repeti...

It is generally assumed that intensity can be used as a proxy of the arousing properties odors: more concentrated an odorant, intense odor and stimulating less relaxing odor. The aim present study was thus to investigate relationship between odors when judged on two independent scales, for different levels stimulus concentration. Thirty-three volunteers relaxing, stimulating, pleasantness, fami...

Emotions are characterized by synchronized changes in several components of an organism. Among them, physiological variations provide energy support for the expression of approach/avoid action tendencies induced by relevant stimuli, while self-reported subjective pleasantness feelings integrate all other emotional components and are plastic. Consequently, emotional responses evoked by odors sho...

Heroin addicts consume large quantities of refined sugars. This study investigated the effect of opiate use and antagonism on sweet taste in opiate-maintained drug users and detoxified former chronic opiate users, using a within-subject design. Seven opiate users received methadone and seven buprenorphine maintenance. Six detoxified subjects received naltrexone. Sucrose recognition thresholds a...

Three experiments investigated the mnemonic effects of source-constrained retrieval in the survival-processing paradigm. Participants were asked to make survival-based or control decisions (pleasantness or moving judgments) about items prior to a source identification test. The source test was followed by a surprise free recall test for all items processed during the experiment, including the n...

STUDY OBJECTIVES To evaluate the potential coerciveness of clinical research trial (CRT) acronyms, and to make clinicians aware that some CRT acronyms may be coercive to research subjects by subliminally enticing or outwardly promising something that the CRT may not be able to deliver. DESIGN Analysis of CRT acronyms for pleasantness and meaningfulness as assessed by studies in the behavioral...