Erman DOĞAN, Serdar TOK, Şenol GÜVEN, Nihal DAL

THE EFFECTS OF NEUROTICISM ON APPROACH-AVOIDANCE-RELATED MOTOR BEHAVIOR

In the present study, we aimed to investigate whether positive emotional stimuli may affect high and low neuroticism individuals’ maximal voluntary contraction (MVC) level of the biceps brachii muscle, which is considered a motor representation of approach behavior. The sample consisted of 36 right-handed individuals (12 females) ranging in age from 18 to 27 (M= 23.516 [2.120]). Participants completed items from the Big Five Factor Personality Inventory concerning Neuroticism. After completing the psychometric test, we exposed participants to the high valance low arousal pictures selected from the International Affective Picture System (IAPS) via Biotrace+ software during the execution of arm flexions. Participants made 2 MVC attempts for each experimental condition lasting 6 seconds and rested 3 minutes between MVC attempts to eliminate the effect of fatigue. Results of Pearson correlation analysis revealed that the percent change of MVC was positively associated with neuroticism (r= .368, p< .05). The results also showed that the percent change of MVC of the high neuroticism group was significantly greater than the percent change of the low neuroticism group [t(36)= -2.449, p= .020]. Results provided some support for our hypothesis. Hence the data demonstrated that positive emotional stimuli decreased the MVC of the biceps brachii muscle in individuals with low neuroticism. On the contrary, MVC levels of high neuroticism individuals remained almost stable in response to positive emotional stimuli.

Keywords:

Neuroticism, Approach-Avoidance motivation, MVC,

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