067: Does the Marshmallow Test tell us anything useful?

The Marshmallow Test is one of the most famous experiments in Psychology: Dr. Walter Mischel and his colleagues presented a preschooler with a marshmallow.  The child was told that the researcher had to leave the room for a period of time and the child could either wait until the researcher returned and have two marshmallows, or if the child couldn’t wait, they could call the researcher back by ringing a bell and just have one marshmallow.  The idea was to figure how delayed gratification develops, and, in later studies, understand its importance in our children’s lives and academic success.   Dr. Mischel and his colleagues have followed some of the children he originally studied and have made all kinds of observations about their academic, social, and coping competence, and even their health later in life. But a new study by Dr. Tyler Watts casts some doubt on the original results.  In this episode we talk with Dr. Watts about the original work and some of its flaws (for example, did you know that the original sample consisted entirely of White children of professors and grad students, but the results were extrapolated as if they apply to all children?).  We then discuss the impact of his new work, and what parents should take away from all of this. As a side note that you might enjoy, my almost 4YO saw me open my computer to publish this episode and asked me what I was doing.  I said I needed to publish a podcast episode and she asked me what it was about.  I told her it’s about the Marshmallow Test and asked her if she wanted to try it. She is, as I type, sitting at our dining room table with three marshmallows on a plate in front of her, trying to hold out for 15 minutes.  We’re not doing it in strictly; we are both still in the room with her, although we’re both typing and ignoring her and asking her to turn back toward the table when she asks us a question. She keeps asking how many minutes have passed, which I imagine (as I tell her) is quite helpful to her in terms of measuring the remaining effort needed.  She seems most torn between wanting to continue building her Lego airport and the need for the three marshmallows.  She has sung a bit, and smelled the marshmallows a bit, and stacked them into a tower, but she is mostly trying to ignore them and is counting as high as she can. 14 minute update [quiet, despairing voice]: “I’ve been waiting for so long…” She did make it to 15 minutes (that’s her devouring the third marshmallow in the picture for this episode), although I wonder if she might not have without the time updates.  We’ll have to try that another day:-)   References Bembenutty, H., & Karabenick, S.A. (2004). Inherent association between academic delay of gratification, future time perspective, and self-regulated learning. Educational Psychology Review 16(1), 35-57. Bennett, J. (2018, May 25). NYU Steinhardt Professor replicates famous Marshmallow Test, makes new observations. New York University. Retrieved from https://www.nyu.edu/about/news-publications/news/2018/may/nyu-professor-replicates-longitudinal-work-on-famous-marshmallow.html Berman M.G., Yourganov, G., Askren, M.K., Ayduk, O., Casey, B.J., Gotlib, I.H., Kross, E., McIntosh, A.R., Strogher, S., Wilson, N.L., Zayas, V., Mischel, W., Shoda, Y., & Jonides, J. (2013). Dimensionality of brain networks linked to life-long individual differences in self-control. Nature Communications 4(1373), 1-7. Bronfenbrenner, U. (1979). The ecology of human development: Experiments by nature and design. Cambridge, MA: Harvard University Press. Calarco, J.M. (2018, June 1). Why rich kids are so good at the Marshmallow Test. The Atlantic. Retrieved from https://www.theatlantic.com/family/archive/2018/06/marshmallow-test/561779/?utm_source=newsletter&utm_medium=email&utm_campaign=family-weekly-newsletter&utm_content=20180602&silverid-ref=MzYwODc2MjE4MjE4S0 Carlson, S.M., Shoda, Y., Ayduk, O., Aber, L., Schaefer, C., Sethi, A., Wilson, N., Peake, P.K., & Mischel, W. (2017). Cohort effects in children’s delay of gratification. HECO Working Paper Series 2017-077. Duckworth, A.L., Tsukayama, E., & Kirby, T.A. (2013). Is it really self-control? Examining the predictive power of the delay of gratification task. Personality and Social Psychology Bulletin 39(7), 843-855. Imuta, K., Hayne, H., & Scarf, D. (2014). I want it all and I want it now: Delay of gratification in preschool children. Developmental Psychobiology 56, 1541-1552. Kidd, C., Palmeri, H., & Aslin, R.N. (2012). Rational snacking: Young children’s decision-making on the marshmallow task is moderated by beliefs about environmental reliability. Cognition 126, 109-114. Michaelson, L.E., & Munakata, Y. (2016). Trust matters: Seeing how an adult treats another person influences preschoolers’ willingness to delay gratification. Developmental Science 19(6), 1011-1019. Mischel, W., & Ebbesen, E. (1970). Attention in delay of gratification. Journal of Personality and Social Psychology 16(2), 329-337. Mischel, W., Ebbesen E.B., & Zeiss, A.R. (1972). Cognitive and attentional mechanisms in delay of gratification. Journal of Personality and Social Psychology 21(2), 204-218. Mischel, W., & Baker, N. (1975). Cognitive appraisals and transformations in delay behavior. Journal of Personality and Social Psycholgy 31(2), 254-261. Mischel, Q., Shsoda, Y., & Peake, P.K. (1988). The nature of adolescent competences predicted by preschool delay of gratification. Journal of Personality and Social Psychology 54(4), 687-696. Mischel, W., Ayduk, O., Berman, M., Casey, B.J., Gotlib, I.H., Jonides, J., Kross, E., Teslovich, T., Wilson, N.L., Zayas, V., & Shoda, Y. (2011). ‘Willpower’ over the life span: Decomposing self-regulation. SCAN 6, 252-256. Schlam, T.R., Wilson, N.L., Shoda, Y., Mischel, W., & Ayduk, O. (2013). Preschoolers’ delay of gratification predicts their body mass 30 years later. The Journal of Pediatrics 162(1), 90-93. Shoda, Y., Mischel, W., & Peake, P.K. (1990). Predicting adolescent cognitive and self-regulatory competencies from preschool delay of gratification: Identifying diagnostic conditions. Developmental Psychology 26(6), 978-986. Tangney, J.P., Baumeister, R.F., & Boone, A.L. (2004). High self0control predicts good adjustment, less pathology, better grades, and interpersonal success. Journal of Personality 72(2), 271-324. Watts, T.W., Duncan, G.J., & Quan, H. (2018). Revisiting the Marshmallow Test: A conceptual replication investigating links between early delay of gratification and later outcomes. Psychological Science 1-19.  DOI: https://doi.org/10.1177/0956797618761661   Read Full Transcript   Transcript Jen:    [00:38] Hello and welcome to today’s episode of the Your Parenting Mojo podcast. Following on from our recent episode on the 30 Million Word Gap, today we’re going to take another close look at a piece of classic research. This time we’re looking at The Marshmallow Study. You’ve probably heard of the study because it’s one of the most famous ones in the field of psychology. Dr Walter Mischel and his colleagues presented a preschooler with a marshmallow. The child was told that the researcher had to leave the room for a period of time and the child could either wait until the research he returned and have two marshmallows, or if the child couldn’t wait, they could call the researcher back by ringing a bell. But then they’d only get to have one marshmallow. The idea was to figure out how delayed gratification develops and in later studies to understand its importance in our children’s lives and academic success. I was actually surprised to find that the marshmallow study consisted of a series of studies starting in the early 1960s and continuing for over a decade, and my guest today, Dr Tyler Watts of New York University, has just published a new study with his colleagues to try and help us understand whether the impacts of delayed gratification really are as large as that body of research indicates. Dr Watts as a research assistant professor and postdoctoral scholar and the Steinhardt School of Culture Education and human development in New York University. He received his Ba from the University of Texas at Austin and his PhD From the University of California Irvine. Welcome Dr Watts. Dr. Watts:  [02:00] Thank you. Jen:   [02:01] So I wonder if you could start out just by sending a bit of context for us. Can you describe this series of experiments that’s become known as the marshmallow study and what was the basic procedure that was used and what did the researchers find? Dr. Watts: