Timing and Counting Psychology 3906 Introduction Just like

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Timing and Counting Psychology 3906

Timing and Counting Psychology 3906

Introduction • Just like spatial stuff in a sense • Time passes • Would

Introduction • Just like spatial stuff in a sense • Time passes • Would make sense to be able to encode this • Would make sense to respond to this • Both long and short intervals have been studied

Circadian timing • Much of what happens on this planet depends on the time

Circadian timing • Much of what happens on this planet depends on the time of day • From fungi to humans, our baheviour is rhythmic • Studied through entrainment – Synchronizing the external and the internal – Endogenous rhythms are a tad more or less than 24 hr

What makes entrainment special? • • Agent acts in absence of other cues Rhythms

What makes entrainment special? • • Agent acts in absence of other cues Rhythms adjusted Stable phase relationship Removal changes pattern

genes • Tau in hamsters • Per in drosophila • Genetic structure almost the

genes • Tau in hamsters • Per in drosophila • Genetic structure almost the same which is fracking cool

Interval timing • • • Seconds or minutes rather than hours Train the animal

Interval timing • • • Seconds or minutes rather than hours Train the animal to an FI Peak procedure with empty trials Weber’s Law Resetting

Other theories • • Connectionist modeling and oscillators Be. T not so good on

Other theories • • Connectionist modeling and oscillators Be. T not so good on trial by trial data Connectionist model may be the best

Counting • Seems unlikely to some, but why not? • Many - few discriminations

Counting • Seems unlikely to some, but why not? • Many - few discriminations • Olthoff, Iden and Roberts (1997)

Conclusions • Animals have abilities that may surprise us • However, we should not

Conclusions • Animals have abilities that may surprise us • However, we should not be surprised, keeping track of time and number is really important for things like foraging

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