PSYC 355 Lecture Notes - Lecture 4: Lightning, Absolute Difference, Habituation
23 Feb 2017
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Counting: timing and number, the approximate number system, operations, ordinality, timing and number. Meck & church (1983) & roberts et al. (1995): with rats and pigeons. Trained to press one lever if 2 sounds, another key if 8 sounds. Platt & johnson (1971) & cordes et al. (2001) Rats press lever certain amount of times to get food reward. If they go under or over = no reward. For both, the variance increased as the number to be counted increased. The pacemaker also serves as a bridge for not just a time accumulator, but also a count accumulator. The variance increased as the number to be counted increased. Now research focuses on number over time, mores specifically how number is represented in the mind: the approximate number system (ans) A cognitive system that represents an imprecise estimate of the number of discrete entities in a set (ie. the numerosity: discrete entities = number of sounds/ flashes.
