Task 4-History and Foundations

- Discovered that although many plants were capable of self-fertilisation, they seemed to avoid it.
o Furthermore, if it happened, the offspring were on average less healthy.
o Cross-fertilisation produced variation in the offspring that was more vital and sometimes even resulted in the creation of a new type of flower.

• Core Principles of Evolution:

Inheritance, Variation, Selection: Essential components for evolution.

Genetic Definition: Every creature is defined by its genetic information, encoded in the DNA sequence.

• Darwin’s Key Theories:

Natural and Sexual Selection: These theories guide modern psychological research, focusing on adaptive problems related to survival and reproducti

o Natural selection:
- the environment results in the continuation and multiplication of organisms with certain genetic features(favourable) and hinders the reproduction of organisms with other genetic features (unfavourable).

o Survival of the fittest=outcome of natural selection:
- only organisms that fit within the environment and can produce viable offspring survive

- Comparative psychology
- Evolutionary Psychology
-Cognitive Psychology
• Individual Differences:

Shift in Research: Prior to Darwin, research focused on averages and similarities among humans. Darwin’s theories prompted studies on individual differences.

Impact on General Psychology:

Biological Basis: Darwin’s theories reinforced the biological foundations of much of modern psychology.

Perception and Sensation:

Discoveries: Led to phenomena like auditory looming bias and visual descent illusion.

• Theoretical Lens: Evolutionary psychology is not a separate branch but a perspective that informs all areas of psychology.

Core Premises:

Evolution of the Brain: Evolution has shaped not only the body but also the brain, psychological mechanisms, and behaviors.

Psychological Adaptations: Many psychological mechanisms are adaptations to solve historical survival and reproduction problems.

Modern Environments: These adaptations are activated in modern contexts, which differ from ancestral ones.

Adaptive Functions: Understanding the adaptive functions of psychological mechanisms is essential for comprehensive psychological science.

Applications:

Social Psychology: Explores adaptations for altruism and social conflict.

Developmental Psychology: Examines how events like father presence/absence influence development.

Clinical Psychology: Defines psychological disorders as failures of evolved mechanisms and explores mismatches between ancestral and modern environments.

Personality Psychology: Begins to uncover adaptive individual differences.

Fusion of signal detection theory and evolutionary costs of cognitive errors, identifying functional cognitive biases that are adaptively designed to err.

- he had no convincing ideas about how variations in characteristics were passed down the generations.
o Genes are copied and passed on to each creature’s offspring. But the process of copying can introduce small mistakes, which produce random changes in the DNA information. These are the mutations that lead to variation in the population.
o Some mutations bring advantages, which make reproduction more likely in a particular environment. So, again, we have inheritance, variation and selection, but this time among molecules.
- Many accepted the idea of evolution but not the mechanism he proposed. Some thought natural selection explained some cases of adaptation, but not other

• Alternative to Evolution: Presented by conservative Christians as an alternative to evolutionary theory.

Conservative Bias: Strong conservative Christian influence, often downplayed by proponents.

Complexity Argument:

Claim: Some processes/functions are too complex to have evolved naturally, implying a powerful Designer’s intervention.

Supernatural Propositions: ID advocates want these included in scientific discourse.

Criticism of Evolution: ID proponents often attack evolutionary science with discredited arguments but claim ID has scientific validity.

Irreducible Complexity: The idea that if a complex structure fails when a part is removed, it couldn’t have evolved naturally. This is refuted by examples in evolution where structures gain secondary functions.

Specified Complexity: Attempts to quantify the improbability of irreducible complexity using probability theory, but lacks credible probability assignments.

Lack of Peer Review: ID ideas are not published in peer-reviewed scientific journals, which is a crucial part of validating scientific research.

Rejection of Natural Selection: ID proponents deny the extent of evolutionary changes attributed to natural selection.

Homology Concept: ID challenges the concept of homology, which is fundamental to comparative biology.

- Darwin’s theories of natural and sexual selection identified the primary forces that shape both physiological structures and psychological mechanisms alike.
o Combined with the recent theoretical advances offered by genic selection and inclusive fitness theory, Darwin’s principles have proved to be invaluable tools for mapping the structure of the modern human mind and linking it with our long evolutionary history.
-> the threats our ancestors faced left their legacy in the particular fears and phobias humans are most likely to acquire – fears of fanged creatures like spiders and snakes, but not of modern-day threats like the guns and fast moving cars that are far more likely to kill us today.
- Darwin’s theory led to the idea that the only solution to social problems was to discourage reproduction by those with undesirable traits, while encouraging reproduction by society’s worthier elements. -> Eugenics
- Whereas in Britain, the First World War provoked many Darwinians to reevaluate the evolutionary consequences of warfare, in Germany, it reinforced the view of war as nature’s way of ensuring the survival of the fitte

o Research applying Darwinian principles has also shown that kinship is a privileged social relationship, governed by specialized psychological mechanisms that infer relatedness based on ancestrally available cues that reliably distinguished kin from non-kin and between different types of kin.

o essentially conservative ideology and social movement, which appropriated the theory of evolution by natural selection to support unrestricted laissez-faire at home and colonialism abroad.
o Its proponents held that it was only natural that ‘the best competitors in a competitive situation would win’, that this process would lead to continuing (if slow) improvement, and that efforts to hasten improvement through social reform were doomed to failure.
o Socialists found in Darwinism support for religious scepticism and belief in the inevitability of change.
o is muddied not just by the use of Darwinism to justify a variety of existing or proposed social arrangements, but by the fact that many advocates of laissez-faire rejected the principle of natural selection or minimised its significanc