Sex Differences in Parental Investment

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1. What did Werner and Lotem find?

  • Men who don't have full parental uncertainty will spend less time with offpsring
  • Male Cichild fish will choose the largest female as they are more likely to produce the largest eggs
  • Male Orb-weaving spiders are more likely to choose larger females when competition is high
  • Men don't discriminate in the way they treat their biological children and step children
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2. Problem with this theory being based on evolution

  • Its based on hunter-gatherer times and can be applied to this modern world as 2 species of apes closely related to humans show little or no parental investment wheras modern day fathers are much more involved in bringing up their children
  • Its deterministic to suggest this theory
  • Cause and effect of evolution and sex differences in parental investments cannot be found

3. What did Anderson (1999) find?

  • Men are more negatively affected by sexual infidelity as shown by physiological tests and self-reports
  • Men don't discriminate in the way they treat their own biological children and their partner's children from a previous relationship
  • Male cichild fish prefer largest females as they can produce more eggs
  • Men who are unsure of their parental uncertainty will spend less time with these offspring?

4. Which international meta-analysis carried out over 50 years found the frequency of cuckcoldry was 1 out of 25 families ?

  • Anderson (1999)
  • Bellis et al.
  • Anderson (2007)
  • Werner and Lotem

5. Which study found that men who are unsure of their parental uncertainty will spend less time with these children?

  • Anderson (2007)
  • Anderson (1999)
  • Bellis et al.

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