doi:

DOI: 10.3724/SP.J.1041.2008.00301

Acta Psychologica Sinica (心理学报) 2008/40:3 PP.301-306

The Effects of Positive Emotions on Task Switching


Abstract:
The generation of appropriate behavioral responses requires the ability to understand the global rules governing stimulus classification, to select the most fitting response from among competing possibilities, and to inhibit task-inappropriate prepotent responses. Cognitive flexibility refers to the ability to shift to a different thought or action according to the changes in a situation. Task switching is the most important component of cognitive flexibility. In task switching paradigms, subjects are assigned two or more tasks and are asked to perform each when certain conditions are met. In some trials, the subjects repeatedly perform each task, whereas in others, they switch from one task to another. Response times (RTs) on repeated-task trials are typically shorter than those in 'switch' trials. Switch cost is empirically defined as the reaction time difference between switch trials and repeat trials. According to the broaden-and-build theory of positive emotions, these kinds of emotions do not typically arise in life-threatening circumstances, and perhaps by consequence, they broaden a person's momentary thought-action repertoire and especially enhance cognitive flexibility. The present study was conducted to investigate the effects of emotional responses on task switching. Two experiments were conducted. In Experiment 1, the participants performed a digit-categorization task in the following three moods: positive emotion, negative emotion, and neutral mood. The task involved two conditions: maintaining condition and switching condition. In the maintaining condition, participants were required to respond to a target digit appearing in a pre-specified color, while ignoring a distracter digit appearing in a different color. In the switching condition, the participants had to respond to the stimuli in a new color, while the distracters appeared in the color of the previous target. Experiment 2 further explored the facilitating effect of positive emotions upon task switching by the addition of another switching condition. The results of Experiment 1 indicated that emotional conditions influenced the performance of task switching. Compared with the neutral condition, positive emotions always reduced the switching cost, while negative emotions increased it. In Experiment 2, the results indicated that positive emotions biased attention toward novel stimuli, thus facilitating the switch to a new stimulus category. These results demonstrated that compared with neutral or negative emotions, positive emotions promoted cognitive flexibility and reduced perseveration. These results are consistent with those of other studies on the effects of positive emotions on cognitive control. This study supports and extends Fredrickson's broaden-and-build theory of positive emotions. In addition, the results of the present study also provide a possible explanation for positive emotions reducing the switching cost.

Key words:positive emotions,task switching,switch cost

ReleaseDate:2014-07-21 14:20:52



1 Levenson R W. Human emotion: A functional view. In Ekman P, Davidson R J (Eds). The nature of emotion: fundamental questions. New York: Oxford University Press, 1994. 123~126

2 Isen A M. An Influence of positive affect on decision making in complex situations: theoretical issues with practical implications. Journal of Consumer Psychology, 2001, 11(2): 75~85

3 Fredrickosn B L. The role of positive emotions in positive psychology: The broaden-and -build theory of positive emotions. American Psychologist: Special issue, 2001, 56: 218~226

4 Hill E L. Evaluating the theory of executive dysfunction in autism. Developmental Review, 2004, 24: 89~233

5 Woodward T S, Ruff C C, Ngan T C. Short- and long- term changes in anterior cingulate activation during resolution of task-set competition. Brain Research, 2006, 1068: 161~169

6 Woodward T S, Meier B, Tipper C, et al. Bivalency is costly: bivalent stimuli elicit cautious responding. Experimental Psychology, 2003, 50: 233~238

7 Woodward T S, Bub D N, Hunter M A. Task switching deficits associated with Parkinson's disease reflect depleted attentional resources. Neuropsychologia, 2002, 40: 1948~1955 

8 Monsell S. Task switching. TRENDS in cognitive sciences, 2003, 7(3): 134~140 

9 Lang P J, Bradley M M, Cuthbert B N. International Affective Picture System (IAPS): Technical manual and affect ratings (University of Florida Center for Research in Psychophysiology, Gainesville, FL), 1998

10 Gasper K. When necessity is the mother of invention: Mood and problem solving. Journal of Experimental Social Psychology, 2003, 39: 248~262

11 Phillip L H, Bull R, Adams E, et al. Positive mood and executive functions: Evidence from Stroop and fluency tasks. Emotion, 2002, 2: 12~22 

12 Fredrickosn B L. Positive emotion broaden the scope of attention and thought-action repertories. Cognition and Emotion, 2005, 3: 1~20 

13 Baumann N, Kuhl J. Positive affect and flexibility: Overcoming the precedence of global over local processing of visual information. Motivation and Emotion, 2005, 29(2): 123~134

14 Rebecca C, Derrick W, Golnaz P, et al. Association between positive affect and attention shifting. Cognitive Therapy Research, 2004, 28 (6): 733~744

15 Kuhl J, Kazen M. Volitional facilitation of difficult intentions: Joint activation of intention memory and positive affect removes Stroop interference. Journal of Experimental Psychology: General, 1999, 128(3): 382~399 

16 Fredrickson B L. What good are positive emotions? Review of General Psychology, 1998, 2: 300~319 

17 Izard C E. Human emotions. New York: Plenum Press, 1977. 123~126

18 Ellis H, Ashbrook P W. Resource allocation model of the effects of depressed mood states on memory. In: Fielder K, Forgas J. (Eds.) Affect, cognition, and social behavior. Lewison, NY: Hogrefe, 1988. 25~43

19 Oaksford M, Morris F, Grainger B, et al. Mood, reasoning, and central executive processes. Journal of Experimental Psychology: Learning, Memory, Cognition, 1996, 22: 476~492 

20 Buodo G, Sarlo M, Palomba D. Attentional resources measured by reaction times highlight differences within pleasant and unpleasant, high arousing stimuli. Motivation and Emotion, 2002, 26: 123~138

21 Dibartolo P M, Brown T A, Barlow D H. Effects of anxiety on attentional allocation and task performance: an information processing analysis. Behavior Research and Therapy, 1997, 35(12): 1101~1111

22 Meng Z L, Wang L, Liu X D, et al. The organizational function of emotion on cognitive task performance in infancy. Research and Clinical Center for Child Development, 1990, 12: 119~129

23 Posner M I, Petersen S E. The attention system of the human brain. Annual Review of Neuroscience, 1990, 13: 25~42

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