Psychology Books and Experiments

Piaget on stages of development.

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Theories on affectional bond, attachment theory, behavioral system, drives, energy, interaction, memory, motivation etc.

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The logic of twin studies is that if a behavioural trait is more similar in pairs of MZ (monozygotic) twins than it is in pairs of DZ (dizygotc) twins, then that trait must presumably be under a degree of genetic influence. More:
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The Dictionary of Arguments is a reference work and at the same time an overview of theories and controversies in psychology. It offers synopses in tabular form, explanations of terms, and a search function that makes counterarguments systematically findable. The level of difficulty goes from definitions that facilitate understanding to discussion between researchers. The site is non-commercial and free of advertising.
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