| Full text | |
| Author(s): |
Amd, Micah
[1, 2, 3]
;
Machado, Armando
[4]
;
de Oliveira, Marlon Alexandre
[2]
;
Passarelli, Denise Aparecida
[2]
;
De Rose, Julio C.
[3]
Total Authors: 5
|
| Affiliation: | [1] McGill Univ, Montreal Neurol Inst, Montreal, PQ - Canada
[2] Univ Fed Sao Carlos, Dept Psychol, Lab Human Behav Studies, Natl Inst Sci & Technol INCT ECCE, Sao Carlos, SP - Brazil
[3] Univ South Pacific, Dept Psychol, Suva - Fiji
[4] Univ Minho, Sch Psychol, Minho - Portugal
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | FRONTIERS IN PSYCHOLOGY; v. 10, APR 10 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
A meaningless symbol that repeatedly co-occurs with emotionally salient faces (US) can transform into a valenced symbol (CS). US-to-CS valence transformations have been observed for CS that have been directly (US. CS0) and indirectly (US -> CS0 -> CS1 -> CS2) linked with face US. The structure of a US -> CS0 -> CS1 -> CS2 series may be conceptualized in terms of ``nodal distance,{''} where CS0, CS1, and CS2 are 0, 1, and 2 nodes from the US respectively. Increasing nodal distance between an evaluated CS and its linked US can reduce magnitude of observed CS valence transformations. We explored currently whether nodal distance can influence CS valence extinction, which describes reductions in CS valence following repeated exposures to CS without any accompanying US. In our study, faces with happy/neutral/sad expressions (US) were directly linked with nonsense words (US -> CS0). The directly linked CS0 was concurrently linked with other words (CS0 -> CS1, CS1 -> CS2). Subjects evaluated all stimuli before and after conditioning, then continued to provide CS evaluations twice a week for 6 weeks. Bayesian factors provided credible evidence for the transformation and extinction of CS valences that were 0 and 1 nodes from US (all BF10's > 100). The variability across post-conditioning CS evaluations provides indirect evidence for context-sensitive/propositional and structural/associative operations during CS evaluations. (AU) | |
| FAPESP's process: | 15/24159-4 - Effects of delay on the decay of conditioned and derived valence functions |
| Grantee: | Micah Ahmad |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/02550-9 - Neurophysiological correlates of an emergent valence trace |
| Grantee: | Micah Ahmad |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
| FAPESP's process: | 14/50909-8 - INCT 2014: Behavior, Cognition and Teaching (INCT-ECCE): relational learning and symbolic functioning |
| Grantee: | Deisy das Graças de Souza |
| Support Opportunities: | Research Projects - Thematic Grants |