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THE BIOLOGICAL APPROACH

The Foundational View

Key Premise

The biological approach in psychology emphasizes the importance of genetics, neuroanatomy, neurochemistry, and evolutionary influences in understanding behaviour. It views humans as biological organisms and explains psychological traits and behaviours through physiological processes.

Genetic Fundamentals

The approach proposes that behaviour is inherited through genes. Understanding genetic terminology is crucial for studying heritability.

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Genotype

A person’s actual genetic makeup.
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Phenotype

The observable characteristics resulting from the interaction of genotype and the environment.
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Heritability

The extent to which genetics contribute to behavioural traits.

Evolutionary Influence

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Adaptive Behaviors: Biological psychologists argue that many behaviours have evolved because they increase the chances of survival and reproduction.

Neural Architecture

Specific brain and nervous system structures are linked to different behaviours and functions:

1

The cerebral cortex

Involved in complex thinking and decision-making.
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The limbic system

Includes the amygdala and hippocampus, crucial for emotion and memory.
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The hypothalamus

Regulates basic drives such as hunger and thirst.

Neurochemistry

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Dopamine (Motivation)Dopamine is linked to motivation and reward. Excess dopamine activity is associated with schizophrenia.
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Serotonin (Mood)Serotonin regulates mood; low levels are linked to depression.

Cognitive Neuroscience

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How does this approach map complex human cognition, like language?
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By examining how brain damage impacts behaviour, and through brain imaging, it reveals how different brain areas support memory, language, attention, and perception.
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The Biological Approach Deck
Term
Biological Approach Emphasis

What does the biological approach in psychology emphasize?

Answer
Key Concepts

Genetics, neuroanatomy, neurochemistry, and evolutionary influences in understanding behaviour.

Term
Genotype vs Phenotype

What is the difference between genotype and phenotype?

Answer
Definition

Genotype is the genetic makeup; phenotype is the observable traits influenced by genotype and environment.

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Heritability Studies

What type of studies estimate the heritability of behaviour?

Answer
Examples

Twin and family studies.

Term
Evolutionary Theory

How does evolutionary theory explain behaviour?

Answer
Explanation

Behaviours evolved because they increase survival and reproduction chances.

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Brain Structure & Complex Thinking

Which brain structure is involved in complex thinking?

Answer
Brain Area

The cerebral cortex.

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Limbic System Components

Name two components of the limbic system and their functions.

Answer
Components

Amygdala (emotion), hippocampus (memory).

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Hypothalamus Role

What role does the hypothalamus play?

Answer
Function

Regulates basic drives such as hunger and thirst.

Term
Dopamine

What neurotransmitter is linked to motivation and reward?

Answer
Neurotransmitter

Dopamine.

Term
Serotonin

Which neurotransmitter is associated with mood regulation and depression?

Answer
Neurotransmitter

Serotonin.

Term
GABA

What neurotransmitter deficiency is linked to anxiety?

Answer
Neurotransmitter

GABA.

Term
Cognitive Neuroscience

What does cognitive neuroscience study?

Answer
Focus

How brain activity supports cognitive functions like memory and language.

Term
Speech Areas

What brain areas are linked to speech production and comprehension?

Answer
Regions

Broca’s area (production) and Wernicke’s area (comprehension).

🧬 The Biological Approach Quiz

1. What does the biological approach primarily focus on?

The biological approach emphasizes genetics, neuroanatomy, neurochemistry, and evolution in explaining behaviour.

2. Which brain structure is key to memory and emotion?

The hippocampus supports memory and the amygdala is involved in emotion; both are part of the limbic system.

3. True or False: Serotonin imbalance is associated with anxiety.

Serotonin regulates mood and low levels relate to depression. GABA deficiency is linked to anxiety.

4. What type of study is used to estimate genetic influence on behaviour?

Twin studies compare concordance rates in identical vs fraternal twins to estimate genetic contributions.

5. Which neurotransmitter is linked to schizophrenia when in excess?

Excess dopamine activity is associated with schizophrenia symptoms.

📊 Results