Glucose promotes self-control following depletion (#223)

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APA Style

Lisa Astrologo, Felecia Benbow, Chelsea Cyr-Gautier, Charlotte Williams, and Lionel Standing. Glucose promotes self-control following depletion. (2015, May 04). Retrieved 06:41, March 25, 2017 from http://www.PsychFileDrawer.org/replication.php?attempt=MjIz

MLA Style

"Glucose promotes self-control following depletion" Lisa Astrologo, Felecia Benbow, Chelsea Cyr-Gautier, Charlotte Williams, and Lionel Standing. 04 May 2015 14:45 25 Mar 2017, 06:41 <http://www.PsychFileDrawer.org/replication.php?attempt=MjIz>

MHRA Style

'Glucose promotes self-control following depletion', Lisa Astrologo, Felecia Benbow, Chelsea Cyr-Gautier, Charlotte Williams, and Lionel Standing, , 04 May 2015 14:45 <http://www.PsychFileDrawer.org/replication.php?attempt=MjIz> [accessed 25 March 2017]

Chicago Style

"Glucose promotes self-control following depletion", Lisa Astrologo, Felecia Benbow, Chelsea Cyr-Gautier, Charlotte Williams, and Lionel Standing, , http://www.PsychFileDrawer.org/replication.php?attempt=MjIz (accessed March 25, 2017)

CBE/CSE Style

Glucose promotes self-control following depletion [Internet]. Lisa Astrologo, Felecia Benbow, Chelsea Cyr-Gautier, Charlotte Williams, and Lionel Standing; 2015 May 04, 14:45 [cited 2017 Mar 25]. Available from: http://www.PsychFileDrawer.org/replication.php?attempt=MjIz

Reference to Original Report of Finding Gailliot, M. T., Baumeister, R. F., DeWall, N. C., Maner, J. K., Plant, A. E., Tice, D. M., & Brewer, L. E. (2007). Self-control relies on glucose as a limited energy source: Willpower is more than a metaphor. Journal of Personality and Social Psychology, 92(2), 325-336. doi:10.1037/0022-3514.92.2.325
Title Glucose promotes self-control following depletion
If the original article contained multiple experiments, which one did you attempt to replicate? e.g., you might respond 'Study 1' or 'Experiment 4'. Experiment 8
Link to PDF of Original ReportView Article
Brief Statement of Original Result Gailliot et al (2007) found that reduced self-control, caused by thinking of of mortality (cf. dental pain), impairs word-puzzle persistence under placebo conditions. This deficit was eliminated in subjects who had consumed a glucose drink.
Type of Replication Attempted Highly Direct Replication
Result Type Successful Replication
Difference? Same Direction, .010
Number of Subjects 306
Number of Subjects in Original Study 73
Year in which Replication Attempt was Made 2014
Name of Investigators (Real Names Required) Lisa Astrologo, Felecia Benbow, Chelsea Cyr-Gautier, Charlotte Williams, and Lionel Standing
Detailed Description of Method/Results Subjects were randomly assigned to consume either a placebo (lemonade made with water and lemons, plus Splenda sweetener), or lemonade plus 140 calories of glucose instead of the Splenda. Both drinks were 14oz.

They then completed two measures of liking for the drink, followed by filler questionnaires and a crossword for 12min to allow its absorption.

Next they wrote about one of two topics for 5min. For mortality salience they wrote about what would happen to their body after death, and their emotions. For dental salience they wrote about how their body reacts to dental pain, and their emotions.

They were then given a sheet with 20 word fragments (words were selected randomly from the dictionary) and allowed 10min to solve them (e.g. ___ATULA). They were scored for the number of word fragments that were left uncompleted, out of 20.

Finally they estimated how many calories there were in the drink they had consumed.

RESULTS
Mean numbers of uncompleted words (SD)(n) were:

Placebo group
- Dental salience 11.69 (4.17)(80)
- Mortality salience 12.03 (3.66)(71)

Glucose group
- Dental salience 11.06 (4.06) (68)
- Mortality salience 10.61 (3.99) (87)

A 2x2 independent groups ANOVA showed no significant effect of salience, F(1, 302) = .014, p = .91. Fewer uncompleted words were left with the glucose drink, F(1, 302) = 5.01, p = .026. There was no interaction between drink and salience, F(1, 302) = 0.75, p = .39.

An independent groups t-test showed that under mortality salience conditions, fewer words were left after drinking glucose than after placebo, t(156) = 2.33, p = .010. However, with dental pain salience, there was no difference due to the drinks, t(146) = .93, p = .17.

These results support the findings of the target article: glucose compared to placebo increased subjects' self-control, shown as fewer words left uncompleted.


Any Known Methodological Differences
(between original and present study)?
No differences are known (except that the Marlowe-Crowne Social Desirability Scale was not given after testing). A 10 min period was used for consumption of the assigned drink (unspecified duration in the original report). The lemonade used 1 sliced lemon per 56 oz water, plus a packet of Splenda in the placebo condition or 800g glucose per 8L water in the experimental condition.
Email of Investigator
Name of individuals who
actually carried out the project
The data were analyzed by L.Standing, and were collected by the remaining authors.
Location of ProjectNicolls 316, Bishop's University
Characteristics of Subjects
(subject pool, paid, etc.)
University students from subject pool
Unpaid volunteers, undergraduate psychology students. 68% were female.
Where did these subjects reside?Canada
Was this a Class Project?No
Further Details of Results as pdf PDF

Additional Comments
Email of Original Investigator
Quantitive Information The effect size for the effect of glucose observed by Gailliot was d = .33. We observed an effect size of d = .37, thus showing comparability to the original results.
I have complied with ethical standards for experimentation on human beings and, if necessary, have obtained appropriate permission from an Institutional Review Board or other oversight group.
TAG: Attention TAG: JDM TAG: Language TAG: Learning TAG: Memory TAG: Perception TAG: Performance TAG: Problem Solving TAG: Social Cognition TAG: Social Psychology TAG: Thinking

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