Psychology
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AP Psychology — Cheatsheet

Formulas, exam-day tips, and key terms on one page.

On the exam

How to get a 5

Key terms

Function of the myelin sheathInsulates the axon and speeds neural transmission; degeneration (e.g., MS) slows signals.
Negative reinforcement vs punishmentNegative reinforcement removes an aversive stimulus to INCREASE behavior; punishment DECREASES behavior.
Independent vs dependent variableIV is manipulated by the researcher; DV is measured as the outcome.
Rods vs conesRods: peripheral/night, black-and-white, very light-sensitive. Cones: central (fovea) color vision, need bright light.
Three memory processesEncoding (in), storage (hold over time), retrieval (out).
James-Lange vs Cannon-BardJames-Lange: arousal → emotion. Cannon-Bard: arousal and emotion occur simultaneously and independently.
Which structure forms new explicit memories?The hippocampus.
Correlation coefficientFrom −1 to +1; sign = direction, magnitude = strength. Correlation does not prove causation.
DeindividuationLoss of self-awareness/self-restraint in group situations that foster anonymity and arousal.
Operant vs classical conditioningOperant: behavior shaped by consequences. Classical: associating two stimuli to produce a reflexive response.
Neurotransmitter actionReleased into the synaptic gap, binds receptors on the receiving neuron, then reabsorbed (reuptake).
Standard deviationThe average amount scores vary from the mean; larger SD = more spread.