Key features and assumptions of the cognitive approach

The cognitive approach in psychology examines how internal mental processes influence behaviour. It focuses on the ways people perceive, interpret, and respond to information from their environment.

Core elements of the cognitive approach

• Emphasis on mental processes - Behaviour is explained through internal mechanisms such as perception, language, attention, and memory.
• Scientific methods - Cognitive psychologists employ experimental techniques to study these processes objectively and systematically.
• Reductionist perspective - Complex behaviours are broken down into simpler components, often comparing the human mind to a computer that inputs, processes, and outputs information.
• Information processing framework - This views humans as active processors of information, using models to infer how mental activities lead to observable behaviours. For example, memory is often divided into short-term and long-term stores, based on effects like primacy (better recall of early items) and recency (better recall of recent items).

Fundamental assumptions underlying cognition

• Limited processing capacity - The mind can only handle a certain amount of information at once, affected by task complexity and distractions.
• Central control system - A mechanism directs mental operations, demanding more resources for unfamiliar activities compared to routine ones.
• Bidirectional information flow - External stimuli are processed alongside stored knowledge, allowing past experiences to shape current understanding.

The information processing model and computer analogies

Cognitive psychology often draws parallels between human cognition and computer systems, particularly those developed in the mid-20th century. This analogy helps model how the brain handles data.

Key aspects of information processing

• Human-computer similarities - The brain acts as a processor with inputs (sensory data) and outputs (behaviours). Some brain regions form interconnected networks, similar to computer circuits.
• Sequential processing - Involves handling tasks one step at a time, common for complex or novel activities where each stage must complete before the next begins.
• Parallel processing - Allows multiple cognitive pathways to operate simultaneously, efficient for familiar or automatic tasks.

Distinctions between human and computer processing

• Emotional and motivational influences - Human decisions are affected by feelings and drives, unlike emotionless computers.
• Memory characteristics - Humans possess vast but fallible memory storage, prone to errors, while computers have finite but highly reliable memory.
• Free will - People can make independent choices, whereas computers follow programmed instructions without autonomy.

Theoretical models in cognitive psychology

Cognitive psychologists develop abstract representations to explain mental functions. For instance, the multi-store model of memory, derived from experimental evidence, describes how information moves from sensory input to short-term and long-term storage.

Schemas and their role in cognition

Schemas are mental frameworks that organise knowledge about objects, events, or concepts, aiding in the interpretation and prediction of experiences.

Processes involved in schema use

• Assimilation - New information is integrated into an existing schema when it fits well, reinforcing current understanding.
• Accommodation - Existing schemas are adjusted or new ones formed when incoming information conflicts with prior knowledge, enabling adaptation.

Categories of schemas

• Role schemas - Expectations about behaviours associated with specific social positions, such as a doctor being compassionate and skilled in diagnosis.
• Event schemas (scripts) - Sequences of actions in familiar situations, like the steps involved in dining at a restaurant (e.g., being seated, ordering, paying).
• Self-schemas - Personal knowledge structures encompassing one's own traits, including appearance, personality traits, and core beliefs.

Potential drawbacks of schemas

• Resistance to new learning - Schemas can block the acceptance of contradictory information, limiting cognitive flexibility.
• Promotion of bias - They may foster stereotypes and prejudice by oversimplifying groups or situations.
• Selective processing - Individuals often prioritise information that aligns with schemas (easy to assimilate) while disregarding or distorting details that require change (accommodation).

Bartlett's (1932) study on schemas

This influential experiment demonstrated how schemas influence memory reconstruction.

• Method - Participants from England read and later recalled a Native American folk tale, "The War of the Ghosts," which was culturally unfamiliar, at varying intervals.
• Results - Recalls altered the story to match participants' cultural expectations, shortening it and replacing unfamiliar elements with familiar ones (e.g., changing canoes to boats).
• Conclusions - Schemas guide the interpretation and reconstruction of memories, often distorting details to fit existing knowledge.
• Evaluation - The laboratory setting provided controlled conditions but reduced ecological validity, as recalling folk tales is not a typical real-world task. Despite this, the study has been foundational in highlighting schema effects.

Research methods used in cognitive psychology

Cognitive research employs various experimental designs to investigate mental processes, each balancing scientific rigour with real-world applicability.

Primary methods and their characteristics

• Laboratory experiments - Conducted in controlled environments with high reliability due to variable manipulation, but they often lack ecological validity as tasks feel artificial.
• Field experiments - Carried out in everyday settings (e.g., testing attention in a workplace), offering greater ecological validity but with reduced control over extraneous variables.
• Natural experiments - Involve observing behaviours in real-life scenarios without intervention, providing high ecological validity but low reliability due to the absence of random participant allocation and variable control.

Ecological validity

Ecological validity refers to the extent to which findings from a study generalise to natural, everyday situations. High ecological validity means results mirror real-life behaviours, while low validity indicates artificial conditions that may not reflect authentic cognitive processes.

Strengths and limitations of the cognitive approach

The cognitive approach has significantly advanced psychological understanding but is not without criticisms.

Advantages of the cognitive perspective

• Focus on internal processes - It addresses mental activities ignored by other approaches, such as behaviourism, leading to practical applications like cognitive behavioural therapy for mental health issues.
• Scientific foundation - Relies on empirical evidence from experiments, enhancing objectivity and replicability.

Disadvantages of the cognitive perspective

• Artificial research settings - Studies often occur in labs, potentially overlooking how emotions or social contexts affect cognition in real life.
• Neglect of individual variations - It may not fully account for differences in how people process information based on personal experiences or biology.
• Limited real-world applicability - By ignoring broader influences like motivation, the approach can seem overly mechanistic and detached from everyday behaviour.