Chapters 1-3 Flashcards
Adaptation
Having 3 characteristics of natural selection:
1) variability- any trait
2) heritability - offspring resemblance
3) selection - higher reproduction
Animal behavior in psychology
Biopsychology: genetic & physiological mechanisms of behaviour
Evolutionary psychology: evolutionary theory applied to human behaviour
Behavioral psychology
Study of behavior within populations
E.o Wilson - socialbiology: ethology & population genetics, social behavior & genetic substrate & now it evolves
Charles Darwin theories
- behaviour responds to natural selection
- sexual selection male v female choice
Comparative Psychology
lab studies, interested in the mechanisms (learning) not evolution, animals were used as models to study humans
Ethology and its decline
ethology: interest in normal animal behaviour studied from the perspective of Darwin
failure: failed to account for the modern synthesis of darwins theory - darwin and mendels theories combine to understand how evolution works at the genetic level
evolution
a change in properties (or gene frequency) of populations over the course of generations
- populations evolve - population: a group of interbreeding individuals
natural selection
predictable:
1) variability - any trait
2) heritability - offspring resemblance
3) selection - higher reproduction
- dominant heritable traits that can cause a difference in reproduction as well as increase reproduction and population
- acts on morphology (study of the form and structure of organisms), learned and innate behaviour
proximate vs ultimate
proximate:
ontogeny (development) - watching adults
immediate causation (mechanism) - the brain signalling the body
Ultimate:
Function (adaptive values) - attracting males
Evolution
tinbergens four causes of behaviour
1) development - how characteristics develop over time
2) mechanism - how does a characteristic work
3) function - what does it do then v now
4) evolution - what are the evolutionary characteristics, how did it evolve/ change over time
“is-ought” fallacy
the assumption of how things are & how things should be are somehow the same
- what is does not equal what it should be
- infanticide
- forced copulation
- enslaved
Genetic Hitchhiker
genes are passed on in chunks, when one gene are selected the others follow even tho they arent selected
analyzing selection
1) compare traits with proxies of selection - what traits might have been selected
2) response to selection
3) the comparative method
exaptations
an adaptation that may have been made in one context then but is used for something different now
divergence
when a population divides it can develop evolutionary traits - needs a barrier of gene flow