Making decisions with the future in mind: Developmental and comparative identification of mental time travel

https://doi.org/10.1016/j.lmot.2005.02.010Get rights and content

Abstract

Mechanisms that produce behavior which increase future survival chances provide an adaptive advantage. The flexibility of human behavior is at least partly the result of one such mechanism, our ability to travel mentally in time and entertain potential future scenarios. We can study mental time travel in children using language. Current results suggest that key developments occur between the ages of three to five. However, linguistic performance can be misleading as language itself is developing. We therefore advocate the use of methodologies that focus on future-oriented action. Mental time travel required profound changes in humans’ motivational system, so that current behavior could be directed to secure not just present, but individually anticipated future needs. Such behavior should be distinguishable from behavior based on current drives, or on other mechanisms. We propose an experimental paradigm that provides subjects with an opportunity to act now to satisfy a need not currently experienced. This approach may be used to assess mental time travel in nonhuman animals. We conclude by describing a preliminary study employing an adaptation of this paradigm for children.

Section snippets

Future-oriented behavior

It is adaptive to act in ways that increase future survival chances, as long as this does not interfere with current survival needs. Many species display future-oriented behavior, behavior that makes sense only in the light of events that follow it. The adaptive function of behavior, however, has to be separated from the mechanisms that produce it. Future-oriented behavior may not always be based on the individual representing a temporally displaced event, just as mental time travel may not

Language and the development of mental time travel

Some argue that mental time travel is only made possible through language (e.g., Macphail, 2000). We do not think, however, that the absence of language in animals precludes them a priori from mental time travel. Instead, we have argued that the evolution of content must have preceded the evolution of means by which to communicate this content (Suddendorf & Corballis, 1997). Others claim that without language there may be no way of showing mental time travel in nonhuman animals because there

Mental time travel and changes in motivation

Before we introduce an approach on how we might test mental time travel in children and animals, we need to briefly digress and look at key implications of this ability on an organism’s motivational system. Perhaps it is best to tackle this issue from its most complex manifestations and then work down to what is essential. Let us therefore return to Dawkins’ open letter to Prince Charles in which he warns against naïve glorification of nature as the alternative to rational scientific approaches

Mental Time Travel in Action: A Proposal for a NonVerbal Test

Such a test should provide subjects with the opportunity to anticipate a future need. We can exclude simple learning explanations if no trial and error learning opportunity is provided. Analysis of performance on the first trial, for example, can rule out such an explanation. Instinctual explanations, in turn, can be excluded if the experimental scenario does not involve behavior typical of the species tested and if they can solve such problems in a variety of contexts. Coincidence, of course,

The rooms task: A preliminary investigation

Children spend time in an “empty room” and an “active room” and were allowed to take one of several items from the active room to the empty room. Instead of manipulating thirst, however, we created a scenario that drew on the child’s desire to play or avoid boredom. The only object in the empty room was a puzzle board without its puzzle pieces. The puzzle pieces were one of the options children could select in the active room to take back to the empty room. A pilot study demonstrated that

Results and discussion

There were no significant differences across gender and thus the data were collapsed. Analysis of the choices made between conditions revealed that children in the experimental condition were more likely to select the target toy than children in the control condition (χ2 (1, N = 47) = 6.88, p = .009). This effect was present in the two older age groups, four-year-olds (χ2 (1, N = 16) = 6.563, p = .01), and five-year-olds (χ2 (1, N = 16) = 5.333, p = .021), but not in the three-year-olds. Both in the experimental and

Acknowledgments

Work on this manuscript was supported by an Australian Research Council Discovery Grant (DP0208300) to the first author. We thank Valerie Stone for helpful comments on an earlier version of this paper.

References (59)

  • T. Suddendorf et al.

    Like it or not? The mental time travel debate

    Trends in Cognitive Sciences

    (2003)
  • C. Thompson et al.

    The development of future-oriented prudence and altruism in preschoolers

    Cognitive Development

    (1997)
  • M.K. Welch-Ross

    An integrative model of the development of autobiographical memory

    Developmental Review

    (1995)
  • J.B. Benson

    The development of planning: It’s about time

  • N. Bischof

    Das Rätzel Ödipus [The Oedipus riddle]

    (1985)
  • D. Bischof-Koehler

    Kinder auf Zeitreise (Children’s time travel)

    (2000)
  • D. Bischof-Köhler

    Zur Phylogenese menschlicher Motivation [On the phylogeny of human motivation

  • E.V. Clark

    On the acquisition of “before” and “after”

    Journal of Verbal Learning and Verbal Behavior

    (1973)
  • N.S. Clayton et al.

    Can animals recall the past and plan for the future

    Nature Reviews Neuroscience

    (2003)
  • N.S. Clayton et al.

    Episodic-like memory during cache recovery by scrub jays

    Nature

    (1998)
  • N.S. Clayton et al.

    Declarative and episodic-like memory in animals: Personal musings of a scrub jay

  • N.S. Clayton et al.

    Scrub Jays (Aphelocoma coerulescens) form integrated memories of the multiple features of caching episodes

    Journal of Experimental Psychology: Animal Behavior Processes

    (2001)
  • M.C. Corballis

    Recursion as the key to the human mind

  • A. Damasio

    Descartes’ error: emotion, reason, and the human brain

    (1994)
  • Dawkins, R., 2000. An open letter to Prince Charles. Available from...
  • F.B.M. de Waal

    Chimpanzee politics

    (1982)
  • N.J. Emery et al.

    Effects of experience and social context on prospective caching strategies by scrub jays

    Nature

    (2001)
  • W.J. Friedman

    About time: Inventing the fourth dimension

    (1990)
  • W.J. Friedman

    The development of children’s knowledge of the times of future events

    Child Development

    (2000)
  • Cited by (294)

    • Self-initiating and applying episodic foresight in middle childhood

      2023, Journal of Experimental Child Psychology
    View all citing articles on Scopus
    View full text