WEEK 10 Flashcards
NATURAL SELECTION
- Only organisms that survive AND reproduce pass on their genes to the next generation
- Traits that help survival don’t matter without
reproduction - The next generation gets the traits of the “fittest” members of the prior generation
- Traits that help survival tend to be passed on
The Selfish Gene
Evolution favours behaviour at the level of the gene, not the person
e.g. bees share the same gene pool so they are willing to sacrifice themselves for the hive
Naturalistic fallacy
The belief that the genes that get passed down are for “good” traits.
e.g. a gene that tends to make you cheat on your partner
=> wrong morally but good evolutionary
e.g. heart disease passed on as it usually takes effect after people have had kids
What determines how genetically fit you are?
People with more offspring -> it doesn’t matter how successful you are
What purpose do INNER PROCESSES SERVE?
Mental processes help people survive and reproduce
* Hunger –> find and eat food
* Fear –> run away and survive
What is ENVIRONMENT OF EVOLUTIONARY ADAPTEDNESS?
- Genetically modern humans first emerged about 130,000 years ago
- Many aspects of today’s environment are different from EEA.
- Evolution explains human psychology in terms of what was adaptive in EEA - NOT TODAY
- Many features were historically adaptive and maladaptive (not useful but harmful) today
What is an example of EEA and how it is maladaptive?
- Humans crave sweet and fatty foods
- These were precious commodities in the EEA.
- Today, these things are too easily available –> obesity
FEAR AND THE EEA
Due to EEA we have modern fears of things that were more deadly years ago compared to modern times.
e.g. we still fear snakes and spiders more than cars and unprotected sex
- even though cars kill more and unprotected sex is dangerous
PARENTAL INVESTMENT THEORY
- Minimum necessary parental investment between male and female is huge
Females (9 months + childbirth) require more investment than males (5 minutes)
SEX DIFFERENCES IN MATE SELECTION due to PARENTAL INVESTMENT THEORY
Short term
- Men more interested in short term than women (as men require less investment)
Long Term
- Not many differences
- Men value physical attraction more (wide hips = easier to give birth)
- Women value career success more
ENGAGING IN RELATIONSHIPS DIFFERENCE BETWEEN MALES AND FEMALES (Casual Sex Study)
BOTH MEN AND WOMEN WE OK WITH DATES (50%) WHEN ASKED
MEN (70%-90%) MORE LIKELY TO GO BACK TO APARTMENT OR SEX DIRECTLY COMPARED TO WOMEN (10% - 0%)
ERROR MANAGEMENT THEORY
- Better safe than sorry!
- better to look silly and be safe than sorry
e.g. hose or snake? - When uncertain about an object
- People assume the worst (e.g. loud noise = gunshot)
- Make the least-costly error
MAJOR THREATS TO HUMAN FITNESS
- Predators
- Dangerous other humans
- Disease
- Not attracting a mate
- Losing a mate
- Not caring for the children
Mental processes that help people survive and reproduce?
- Disgust
- Anger at cheaters
- Cuteness (babies = want to care for them and protect)
- Sexual attraction
- Mostly based on “good” traits
SEXUAL SELECTION
- Must survive and reproduce to pass on genes
- Selection BASED ON MATE’S PREFERENCES
- Sometimes for costly traits (E.G. peacock tails)