Biological Psychology - Casey (2011)

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  • Created by: Rosa335
  • Created on: 10-06-17 15:23
What was Casey's aim?
To build on previous research to assess whether the delay of gratification in childhood predicts impulse control activities and sensitivity to alluring or social cues at the behavioural and neural level when ppts were in their 40s
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What was Casey's research method
Quasi-Experiment, Longitudinal, In some parts: Repeated Measures.
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What was the IV in this study?
Whether the participants was a high/low delayer
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What was the DV in this study?
The performance on the impulse control task in experiment 1. Performance on impulse control task and imaging results using fMRI
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Describe the sample of the marshmallow test and the self-control scales in their 20s and 30s
562 ppts (4 years old) completed marshmallow test (from Stanford's Bing nursery), 155 of these completed self control scales in their 20s, 135 of these in their 30s.
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Describe Casey's sample.
59 of the previous 135 agreed to take part in experiment 1 (32 high delayers (12m, 20f) 27 low delayers (11m,16f)). 27 agreed to take part in experiment 2 (15 high delayers (5m,10f) 11 low delayers (7m, 4f)) One man was excluded so actually 26 ppts
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Describe the cool version of the go/no-go task in experiment 1
Ppt is told which gender is the target. 160 male/female faces are projected on the screen for 500ms with a 1s interval. Ppt was told to only press the button for go. Accuracy and reaction times were recorded
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Describe the hot version of the go/no-go task in experiment 1
The same task as the cool version but faces and focus were happy/fearful (instead of gender)
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How did they measure brain activity in experiment 2?
fMRI
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What where the tasks during experiment 2?
Similar hot tasks as in experiment 1
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What were the results from experiment 1?
All ppts were highly accurate during the go-tasks. Low delayers committed more false alarms (no-go) than high delayers. Only low delayers showed a significant reduction in performance for the hot trails relative to the cool trails.
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What were the results from experiment 2?
Inferior frontal gyrus was involved in accurately withholding a response (cooling). Low delayers showed higher activity in ventral striatum specifically when the happy faces were the no-go stimulus
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What was one of Casey's conclusions?
Individuals who have difficulty delaying gratification at 4 have more difficulty as adults in suppressing responses to positive social cues than those who don't
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Card 2

Front

What was Casey's research method

Back

Quasi-Experiment, Longitudinal, In some parts: Repeated Measures.

Card 3

Front

What was the IV in this study?

Back

Preview of the front of card 3

Card 4

Front

What was the DV in this study?

Back

Preview of the front of card 4

Card 5

Front

Describe the sample of the marshmallow test and the self-control scales in their 20s and 30s

Back

Preview of the front of card 5
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