Background
The Marshmallow Test was carried out by Walter Mischel in the 1960s in the USA, to test the ability to delay gratification. This research involved offering 4 year old children the choice between eating one marshmallow now, or waiting 15 minutes to eat 2 marshmallows. The children who couldn’t wait were labelled ‘low delayers’ and the children who could were labelled ‘high delayers’
Key Terms
Delay of Gratification
The ability to resist the temptation for an immediate reward and wait for a later reward
Key Terms
Cold Cues
Things that we find neutral
Key Terms
Hot Cues
Things that we find tempting and appealing
Key Terms
Cooling Strategies
Focusing on cool cues to try and resist the temptation of hot cues
Key Terms
Ventral Striatum (Hot Systems)
The area of the brain more active when you are presented with tempting stimuli
Key Terms
Inferior Frontal Gyrus (Cool Systems)
The area of the brain that’s active when you are resisting temptation
Experiment 1
Aim
To investigate if low delayers in the marshmallow test still struggled with resisting temptation in adulthood
Experiment 1
Sample
59 participants from the original Marshmallow Test, all aged 44. 27 were low delayers, 32 were high delayers
Experiment 1
Procedure
Participants each did four ‘Go/No Go’ tasks. In each task they would be shown a series of faces on a laptop and told to press a button when a specific category of face appeared. The target face could be either a male or female face in the ‘Cool’ tasks, or either a happy or scared face in the ‘Hot’ tasks. The most important task was when participants had to hold back from pressing the button when a happy face appeared (a happy face was considered a tempting ‘hot cue’)
Experiment 1
Findings/Conclusion
The high delayers were significantly more successful at not pressing the button when shown a happy face than the low delayers were. This suggests that the ability to delay gratification is a stable characteristic that does not change with age
Experiment 2
Aim
To investigate the areas of the brain thought to be associated with resisting temptation
Experiment 2
Sample
26 of the participants from Experiment 1 were used. 11 were low delayers and 15 were high delayers
Experiment 2
Procedure
Participants were asked to complete the hot versions of the Go/No Go tasks within an fMRI
Experiment 2
Findings
Low delayers had less activity than high delayers in their inferior frontal gyrus and more activity in their ventral striatum
Experiment 2
Conclusion
Differences between people in their ability to delay gratification can be related to neurobiological differences