 Show Does evolution influence behaviour, or does behaviour influence evolution? Offering an evolutionary explanation of behaviour can be more difficult than it first appears, so I want to show two ways to do this. I don’t teach evolution and behaviour as an individual topic in my course, as there are multiple behaviours that are applicable including fear, aggression (both in Criminology), attraction (Love and Marriage) and fear conditioning (PTSD). This means you can use the same content (including studies) to apply to more than one topic. The basic explanation
This is a simple and straightforward explanation that all students will be able to comprehend. It’s even enough to be able to write excellent SARs and essays, if the behaviour and the evidence are explained appropriately. Here is one example that fit this explanation: Attraction (from the Love and Marriage chapter): Men and women have evolved to find particular traits in the opposite sex attractive if those traits are signs that the person is a suitable mate to procreate wit (because they are a sign that they will be able to We’ve evolved to be attracted to signs of fertility, health and strong genetic material. These physical signs are often the result of sex hormones (e.g. testosterone and estrogen). provide healthy offspring). For example, studies have shown that females prefer masculine facial characteristics at the time of ovulation, as this is when they’re most likely to become pregnant and masculine features are a sign of high testosterone which equates to healthy genetic material (and thus a good mating partner).
In this example, our “survival” doesn’t refer to our own individual survival, but the survival of our genetic material. This can be ensured if we procreate with someone who has strong, healthy genes, so we find these people more attractive than others. The advanced explanation
In this second, more advanced, explanation the role of physiology in the behaviour is added. When we break it down we begin to see that it’s like a cycle: the behaviour helps genes being passed on and those genes facilitate that behaviour so it continues which helps genes being passed on so that behaviour occurs which results in genes being passed on… etc. etc. This can get quite tricky, so in order to keep it comprehensible while still detailed I recommend that my advanced students aim to at least add to their basic explanation how the physiology underlies the behaviour.
Fear is a good example for this more advanced explanation as it’s a healthy adaptation as we need to experience a fear response towards things that could harm us, and the underlying physiological processes that facilitate fear are well studied. When we experience fear our physiological arousal increases, which prepares us for the fight/flight response and this response is essential in helping us to deal with the fearful stimuli and thus, survive. Fear is a healthy adaptation, as is the ability to learn to be afraid of something (fear conditioning). The role of the amygdala in the perception of fearful stimuli could be one of the biological factors that is underlying this response. Studies have shown that our amygdala perceives threatening stimuli and activates our stress person before our conscious brain is even aware of it. This is a healthy adaptation as we need to respond quickly to threats or else our lives may be in danger.
A common mistake I see in students responses to exam questions on this topic is that they dive straight into the studies, without first providing a full evolutionary explanation of the behaviour. It’s one of those topics that can be explored at almost never-ending depth, which is why I like to provide two options for how students approach this topic. It’s often the case that I find the evolutionary explanations easy to offer, but explaining the supporting evidence is more difficult. This is another consideration for students as they select their material for exam revision. Travis Dixon is an IB Psychology teacher, author, workshop leader, examiner and IA moderator. How do evolutionary psychologists study human behavior?An evolutionary approach to behaviour involves an analysis of particular recurrent problems faced by the members of a given species and a search across species for correlations between common behaviours and common environmental conditions.
What is an example of evolutionary psychology in humans?For example, as the ability to recognize poisonous snakes was passed down through generations, evolutionary psychology theory says that our brains adapted to include instinctual fear and caution around snakes.
How can evolutionary learning help us understand human behavior?Evolutionary psychology helps us to better understand behavioral patterns by linking them to our early ancestors. We'll trace the journey of evolutionary psychology in academia, beginning with Charles Darwin. We'll then explore how this type of psychology fell out of fashion, but eventually re-emerged.
How does evolutionary psychology relate to human development?Evolutionary developmental psychology posits that this is because individuals inherit a species-typical environment, as well as a species-typical genome. Development follows a species-typical pattern given that individuals within the species grow up in environments that are similar to those of their ancestors.
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