The probable and the possible at 12 months: intuitive reasoning about the uncertain future
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Published on: September 16, 2015
Nicolò Cesana-Arlotti1, Erno Téglás, Luca L Bonatti
1ICREA, Universitat Pompeu Fabra, Barcelona, España ICREA, Universitat Pompeu Fabra, C. Roc Boronat, 138, Edifici Tanger, 55.110, 08018 Barcelona, España.
Insights
Infants as young as 12 months may possess an intuitive grasp of probability, enabling them to predict future events. This suggests sophisticated infant reasoning abilities, challenging current adult probabilistic reasoning theories.
Area of Science:
- Cognitive Development
- Developmental Psychology
- Probabilistic Reasoning
Background:
- Adults often struggle with probability estimation due to heuristics and biases.
- Existing theories suggest adults reason about event frequencies, not single event probabilities.
- Infants may possess an intuitive understanding of probability for novel events.
Purpose of the Study:
- To explore how infants predict future events by estimating probability.
- To present a novel theory on infants' intuitive probability estimation.
- To compare this theory with existing models using current data.
Main Methods:
- Theoretical modeling of infants' intuitive probability estimation.
- Comparison of the proposed theory with existing literature and data.
- Analysis of current evidence on infant probabilistic reasoning.
Main Results:
- Evidence suggests 12-month-old infants can estimate probabilities for single, novel events.
- The proposed theory posits that infants' probability grasp stems from representing logically consistent future possibilities.
- Current data does not uniquely support one theory but indicates sophisticated infant reasoning.
Conclusions:
- Infants demonstrate surprisingly advanced reasoning abilities in probabilistic prediction.
- Infant probabilistic reasoning may be more sophisticated than previously understood.
- Findings challenge established theories of adult logical and probabilistic reasoning.
Abstract:
How do infants predict the next future event, when such a prediction requires estimating the event's probability? The literature suggests that adult humans often fail this task because their probability estimates are affected by heuristics and biases or because they can reason about the frequency of classes of events but not about the probability of single events. Recent evidence suggests instead that already at 12 months infants have an intuitive notion of probability that applies to single, never experienced events and that they may use it to predict what will happen next. We present a theory according to which infants' intuitive grasp of the probability of future events derives from their representation of logically consistent future possibilities. We compare it and other theories against the currently available data. Although the evidence does not speak uniquely in favor of one theory, the results presented and the theories currently being developed to account for them suggest that infants have surprisingly sophisticated reasoning abilities. These conclusions are incompatible with most current theories of adult logical and probabilistic reasoning.
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