Cog Psychology 2ND Sem Notes
Cog Psychology 2ND Sem Notes
Cognitive psychology emerged as a reaction to the limitations of behaviorism and its focus on
external behavior rather than internal mental processes. During the mid-20th century,
psychologists began to shift their attention to understanding how the mind processes
information, solves problems, and uses knowledge. Cognitive psychology is concerned with
how people acquire, store, and use information, and how they perceive, think, and remember.
This chapter introduces the emergence of cognitive psychology and explores foundational
theories related to attention, a key concept in understanding cognitive processes.
Cognitive psychology arose from the need for a deeper understanding of the mind that could
not be captured by behaviorism, which focuses only on observable behavior. While
behaviorism had dominated psychology in the early 20th century, psychologists realized that
studying the mind's internal processes was essential to understanding behavior.
Roots in Information Theory: Cognitive psychology found early support from the
field of information theory, which focuses on how information is transmitted,
processed, and understood. Figures like George Miller (who introduced the famous
concept of "the magical number 7±2") and Noam Chomsky (whose work critiqued
behaviorism and introduced the idea of an innate language-processing mechanism)
played pivotal roles in the formation of cognitive psychology.
Shift from Behaviorism: Behaviorists like John B. Watson and B.F. Skinner
argued that psychology should focus solely on observable behavior, disregarding
mental processes. However, cognitive psychologists like Ulric Neisser (who
published “Cognitive Psychology” in 1967) argued that mental processes such as
thinking, memory, and decision-making could be scientifically studied and should be
included in psychological theory.
Key Focus Areas: Cognitive psychology explores several key areas of human
thought and behavior, such as:
o Perception: How we interpret sensory information.
o Memory: How we encode, store, and retrieve information.
o Language: How we understand, produce, and acquire language.
o Problem-solving: How we find solutions to complex tasks.
o Attention: How we focus on specific stimuli and ignore others.
The Information Processing Approach (IPA) became the dominant model for
understanding how cognitive processes work. It suggests that the brain operates like a
computer, processing inputs (stimuli), storing them in memory, and producing outputs
(responses).
The Information Processing Approach compares the mind to a computer, focusing on how
information is processed in stages. The key elements of the IPA are:
This approach suggests that, like a computer, the brain processes information through distinct
stages. For example, we may attend to certain stimuli, process them into memory, and later
retrieve them when necessary. This conceptualization of human cognition has been
foundational to our understanding of mental functions.
Attention is a cognitive process that allows individuals to focus on specific stimuli while
ignoring others. It is a limited resource, meaning that we can only process a certain amount of
information at any given time. Several theories have been developed to explain how attention
works and how we divide our mental resources between different tasks.
Filter theories propose that attention functions as a "filter," selecting certain stimuli for
further processing while ignoring others.
Overview: Broadbent's theory is one of the first attempts to explain how attention
works. He proposed that we have a bottleneck in our cognitive processing system,
meaning that only a limited amount of information can be processed at a time.
According to Broadbent, information from the environment enters through our
sensory systems (e.g., auditory or visual) and is filtered based on physical
characteristics (such as pitch or loudness for auditory information).
Overview: Treisman modified Broadbent’s filter theory with the attenuation theory.
She proposed that rather than a complete filter, attention works by attenuating or
weakening the strength of irrelevant stimuli, making them less likely to be processed.
In contrast to filter theories, resource theories view attention as a limited pool of cognitive
resources that can be allocated to various tasks. This theory is more dynamic and focuses on
how people manage their mental resources when engaged in multiple tasks.
Overview: Daniel Kahneman proposed that attention is like a mental resource with a
limited capacity. The more resources a task requires, the fewer resources are
available for other tasks. According to Kahneman, we divide our mental resources
between tasks depending on their demands.
The ability to divide attention between multiple tasks depends on several factors, including
task complexity, individual differences, and environmental conditions.
Memory is one of the most important cognitive functions, allowing individuals to store,
retain, and retrieve information. It encompasses various types of memory systems, each
serving different purposes and functions. In this unit, we explore working memory,
semantic and episodic memory, and prospective memory, including their nature, theories,
and real-life applications. Understanding these concepts provides insight into how memory
functions in our daily lives and its relevance to learning and decision-making.
Limited Capacity: Working memory has a limited capacity, which means it can
only hold a small amount of information at one time (typically 7 ± 2 chunks, as
suggested by George Miller).
Short Duration: Information in working memory is only held for a short period
(typically 20-30 seconds) unless actively rehearsed or transferred to long-term
memory.
Active Processing: Unlike passive storage in long-term memory, working memory
involves the active processing and manipulation of information. For instance, when
solving a math problem, working memory is used to store intermediate results and
apply operations.
Working memory is essential for tasks requiring mental manipulation, like problem-solving,
language comprehension, and reasoning. It is also the cognitive system that coordinates with
long-term memory to bring in prior knowledge when necessary.
There are several models that attempt to explain the structure and functioning of working
memory. The most widely known models are:
This model posits that working memory is composed of several components, each
responsible for different types of information processing:
o Central Executive: This is the control system that oversees and coordinates
information from the other subsystems. It is responsible for attentional control,
decision-making, and managing the flow of information between the other
components of working memory.
o Phonological Loop: Responsible for processing verbal and auditory
information. It consists of two parts:
Phonological Store: A short-term store for auditory information.
Articulatory Rehearsal System: Responsible for maintaining verbal
information through rehearsal.
o Visuospatial Sketchpad: Processes visual and spatial information. It is used
when visualizing images or navigating through space.
o
Episodic Buffer: This was later added to the model to integrate information
from different sources (e.g., long-term memory and the subsystems) and create
a coherent, multidimensional representation of the environment.
2. Cowen’s Embedded Processes Model (2005)
In contrast to Baddeley and Hitch, Cowen's model posits that working memory is a
temporary subset of long-term memory, embedded within the broader context of
attention. The capacity of working memory is limited, but it is more flexible and
reliant on the active processing of available resources.
Understanding working memory is essential for education because it plays a crucial role in
learning, comprehension, and problem-solving. Some key applications include:
Cognitive Load Theory: Educators can apply this theory to reduce the cognitive load
on students. By breaking down complex information into smaller, manageable
chunks, teachers can ensure that students do not overload their working memory.
Instructional Design: Techniques like scaffolding, where complex tasks are broken
into simpler steps, help support the working memory of learners.
Improving Retention: Teachers can enhance the retention of information by
encouraging strategies like repetition, elaboration, and visualization. These
strategies can help students transfer information from working memory to long-term
memory.
Memory can be broadly categorized into semantic and episodic memory, two subtypes of
long-term memory that serve distinct functions. Together, these two types of memory
contribute to our overall understanding of the world and our personal experiences.
1. Semantic Memory:
o Definition: Semantic memory refers to our store of general knowledge about
the world, including facts, concepts, and meanings. It is not tied to specific
experiences or events.
o Examples: Knowing that Paris is the capital of France, understanding
mathematical formulas, and recognizing the meaning of the word "apple."
o Characteristics: Semantic memory is impersonal and not connected to a
specific context or time. It is abstract and factual, representing the "what" of
knowledge without reference to when or where it was learned.
2. Episodic Memory:
o Definition: Episodic memory involves the recall of specific events or
experiences in one’s life, including the context, emotions, and details
surrounding those events.
o Examples: Remembering your last birthday party, your first day at school, or
your last vacation.
o Characteristics: Episodic memory is personal and tied to a particular time
and place. It enables us to mentally "travel back" to past events, providing a
sense of autobiographical continuity.
While semantic memory is more stable and less prone to decay, episodic memory is more
dynamic and subject to change over time. Episodic memories can fade or be altered, whereas
semantic memory tends to remain relatively constant.
The level of processing theory suggests that the depth of processing affects memory
retention. The more meaningfully information is processed, the better it is
remembered. There are three levels of processing:
The theory posits that deeper processing leads to better retention because it involves
more cognitive effort and better encoding of information.
Prospective memory failures are common and can happen for various reasons. Some common
causes include:
1. Distractions and Interference: The more tasks a person is juggling, the harder it
becomes to remember future intentions. Multitasking and distractions (e.g., phone
notifications) can make it difficult to remember important tasks.
2. Lack of Cues: Event-based prospective memory relies on external cues. If these cues
are absent or not salient enough, the person might forget the intended action. For
example, you might forget to pick up milk if you don’t pass the store or if you are
distracted.
3. Stress and Cognitive Load: High levels of stress or a high cognitive load (i.e., when
a person is trying to juggle many tasks at once) can impair the ability to remember
future tasks. Under stress, the brain may prioritize more immediate concerns over
future intentions.
4. Age-related Decline: As people age, their prospective memory can decline,
particularly for time-based tasks. This may be due to slower processing speeds or
difficulty in maintaining attention over time.
5. Over-Reliance on External Memory Aids: Many people rely on technology (e.g.,
smartphones or reminders) to aid in prospective memory. While these aids can be
helpful, over-reliance on them can sometimes lead to forgetting to use them or
ignoring important cues.
Introduction
Cognitive psychology seeks to understand how humans process and manipulate information.
A central aspect of this field involves the study of mental representation, which refers to
how we internally visualize or conceptualize objects, events, or ideas. This chapter delves
into two key areas of cognitive psychology: mental imagery and language processing,
covering empirical investigations of mental rotation and mental scanning, the roles of
analogical and propositional reasoning, and key theories of speech production and speech
recognition. We will explore how mental imagery functions in cognitive tasks and how it
interacts with language processing to help us perceive, think, and communicate.
Mental rotation refers to the process of rotating objects in the mind’s eye, simulating a mental
transformation. Research by Roger Shepard and Jacqueline Metzler (1971) explored how
people mentally rotate 3D objects to determine if they match another object or if one is a
rotated version of the other.
Empirical Findings:
o The time it takes for individuals to mentally rotate objects increases as the
degree of rotation between them increases. This suggests that the mind
operates similarly to the physical world when rotating objects.
o Mental Rotation is a visual imagery task, where individuals create mental
representations of objects and manipulate them in their minds as if they were
physically rotating them in space.
The Role of Imagery: Mental rotation tasks depend heavily on visual imagery.
When rotating an object, individuals create a mental image and manipulate it in a
manner similar to the physical manipulation of the object. This process highlights
how imagery is used in cognitive tasks to represent and manipulate objects.
Mental scanning involves the process of mentally navigating through visual scenes or spaces,
akin to scanning a map or navigating through an imagined environment. Roger Shepard’s
research demonstrated that people can mentally scan across a map, and the time it takes to
"travel" between points increases with the physical distance between them on the map.
Empirical Findings:
o Participants took longer to mentally scan between two points that were farther
apart on the map, indicating that mental scanning uses a visual imagery
process that mirrors the physical action of scanning or navigating a space.
o This suggests that our minds create mental maps and use them to simulate
movement, much like we would do in the physical world.
The Role of Imagery: Mental scanning demonstrates the use of visual imagery to
navigate through spatial representations. The results indicate that our mental
processes allow us to create and manipulate mental maps and spatial arrangements.
Analogical reasoning is the process of using knowledge from one domain to solve problems
in another, based on similarities between the two domains. For instance, an individual might
apply solutions from a past problem to a new but structurally similar problem.
Phonology: The sound system of a language. The brain identifies phonemes, the
smallest units of sound that distinguish words.
Morphology: The study of word structure. Words consist of morphemes, which are
the smallest units of meaning (e.g., "cats" contains “cat” and “-s” indicating plural).
Syntax: The rules that govern sentence structure. Speech recognition involves parsing
sentences to understand grammatical relationships between words.
Parsing: The process of breaking down sentences into their syntactic components,
such as subject, verb, and object.
Speech production refers to the cognitive processes involved in forming and articulating
speech. Theories by William Garrett and Gary Dell provide insights into how speech is
produced and why errors occur.
Mental imagery plays a crucial role in tasks like mental rotation and mental scanning,
where individuals manipulate visual representations of objects and spaces in their minds.
Visual Imagery: Both mental rotation and mental scanning are heavily dependent
on visual imagery—the ability to create, manipulate, and navigate mental images in
the absence of actual sensory input. In these tasks, individuals create mental
representations of objects or spaces and transform them, much like physical
manipulation in the real world.
Cognitive Implications: These tasks suggest that mental imagery is not merely a
passive representation but an active, dynamic process that requires cognitive
resources. It mirrors the way we engage with and manipulate objects in the physical
world.
4.2 Theories of Imagery
Dual Coding Theory (Paivio, 1971): This theory suggests that information is
represented in both visual imagery and verbal systems. Imagery and verbal
processing work together to enhance learning and memory.
Propositional Theory: This theory posits that imagery is stored as abstract
representations (propositions) rather than detailed visual images.
Picture Theory: According to this theory, imagery works similarly to pictures in the
mind, where we can actively manipulate images as if they were real objects.
In cognitive psychology, speech errors refer to mistakes made during the production of
spoken language. These errors are not random but often follow systematic patterns that reveal
how the brain organizes and processes language. Understanding speech errors provides
insight into the cognitive mechanisms involved in speech production, helping researchers
understand how we generate and articulate language in real time.
Speech errors can occur at different stages of the speech production process. Cognitive
psychologists typically categorize these errors based on the level at which they occur, such
as:
Phonological errors occur when there is a mistake in the sounds (phonemes) used in speech.
These errors often happen at the level of sound articulation.
Example: "You have hissed all my mystery lectures" (instead of "You have missed
all my history lectures").
Explanation: Phonemes may be swapped, replaced, or omitted due to issues in the
phonological planning of speech.
Example: "I can’t get no satisfaction" (instead of "I can’t get any satisfaction").
Explanation: These errors occur when the syntactic structure of a sentence doesn’t
align with the rules of grammar, often involving word order, subject-verb agreement,
or improper use of negation.
Lexical errors happen when the wrong word is used in a particular context. This can involve
substituting one word for another, or misselecting a word due to similar meanings or sounds.
Example: "I’m going to the hospital to get a tumor removed" (when the person meant
"tumor" but intended "tumor").
Explanation: Lexical errors often result from accessing an incorrect word from
memory, usually because of similarities in sound, meaning, or context.
A slip of the tongue refers to a speech error that occurs when a person accidentally says
something different from what they intended. It is often a result of mental processing errors,
and the brain accidentally produces a word or sound in the wrong context.
Example: "I’m going to the store to buy a rug, I mean a bug" (the person meant to say
"rug," but said "bug").
Explanation: These errors are often unconscious and reflect how the brain organizes
speech.
Introduction
Problem solving is an essential cognitive process, allowing individuals to navigate challenges, think
critically, and devise strategies to overcome obstacles. Cognitive psychology delves into how we
approach, solve, and sometimes fail to solve problems, offering insights into the strategies we
employ and the barriers we encounter. Problem solving is influenced by a variety of cognitive factors,
including mental flexibility, creativity, and cognitive biases. Additionally, cognitive processes are
shaped by cultural factors, which impact how we perceive the world, organize knowledge, and
categorize experiences. This chapter explores problem solving strategies, blocks to problem solving,
creative solutions, and cognitive processes in a cross-cultural context.
Problem solving refers to the mental processes used to find solutions to complex or unfamiliar
situations. It involves identifying the problem, generating possible solutions, evaluating these
solutions, and then selecting the most effective one. This cognitive process is dynamic, often
requiring the flexibility to adapt strategies as new information becomes available.
Cognitive psychologists have identified various strategies individuals use to approach problem-
solving tasks. These strategies vary based on the nature of the problem, the resources available, and
the cognitive tools at hand.
1.2.1 Algorithms
Example: A simple algorithm for solving a math problem involves following the prescribed
rules for addition, subtraction, multiplication, etc.
Advantages: Algorithms are precise and provide the correct answer if applied correctly.
Limitations: They can be time-consuming, especially for complex or ill-defined problems, as
every possibility must be considered.
1.2.2 Heuristics
A heuristic is a mental shortcut or rule of thumb that helps people solve problems more quickly by
simplifying the decision-making process. Unlike algorithms, heuristics do not guarantee a correct
solution but are often effective for finding "good enough" solutions in a reasonable amount of time.
Example: The availability heuristic suggests that people make decisions based on the ease
with which examples come to mind (e.g., people may overestimate the danger of shark
attacks because they remember news stories about them).
Advantages: Faster and more efficient than algorithms, especially for everyday problems.
Limitations: Can lead to biases and errors in judgment.
1.2.3 Insight
Insight is the sudden realization of the solution to a problem, often occurring after a period of
frustration. It is characterized by an “aha!” moment, where the individual perceives the problem in a
new way, suddenly grasping the solution.
Example: A person trying to solve a puzzle might feel stuck for a while and then suddenly see
the solution after stepping away from the problem.
Advantages: Can lead to breakthroughs in problem solving and creativity.
Limitations: Insight is not always reliable and can be difficult to induce.
This strategy involves starting from the goal and working backwards to determine the steps required
to achieve it. This method is especially useful for problems with clearly defined end points.
Example: If you're trying to solve a maze, working backwards from the exit point to the
starting point can provide insight into the correct path.
Advantages: This strategy can often clarify the correct sequence of actions.
Limitations: May not always be applicable to problems where the end goal is not clearly
defined.
In this approach, the problem solver breaks the task into smaller subgoals, reducing the gap between
the current state and the desired solution. At each stage, the solver assesses the differences between
the current situation and the goal and applies actions to reduce that difference.
Example: When solving a complex problem, like writing a research paper, you might break
the task into manageable goals, such as outlining, conducting research, drafting, and
revising.
Advantages: Allows for incremental progress and more manageable tasks.
Limitations: May lead to a focus on short-term solutions without addressing the bigger
picture.
Despite our cognitive abilities, problem solving can often be hindered by various barriers. These
blocks or cognitive obstacles prevent individuals from effectively identifying or implementing
solutions.
Functional fixedness occurs when an individual is unable to think of an object or concept as having
more than one use. This bias limits creativity and prevents the problem solver from seeing alternate
uses or solutions.
Example: When a person is unable to think of using a paperclip as a hook, even though it
might serve that purpose.
Impact: Functional fixedness limits the ability to think creatively and find innovative
solutions.
1.3.2 Mental Set
A mental set is the tendency to approach problems in a specific way, often based on past
experiences, even if a more effective solution exists. This can prevent individuals from considering
alternative solutions.
Example: If a person has successfully solved a problem using a particular strategy in the past,
they may attempt to apply the same method to a new, different problem, even when it’s not
suitable.
Impact: Mental sets can restrict cognitive flexibility and problem-solving ability.
In some cases, insufficient knowledge or expertise in a particular domain can prevent effective
problem solving. Without the necessary background knowledge, the problem solver might miss
important cues or patterns.
Example: A person without a background in physics might struggle to solve problems related
to mechanical systems, even if they have the cognitive ability to do so.
Impact: Limited knowledge constrains problem-solving strategies and their effectiveness.
1.3.4 Overconfidence
Overconfidence occurs when individuals overestimate their ability to solve a problem or their grasp
of a situation. This can lead to insufficient consideration of potential solutions, failure to test
hypotheses, or ignoring contrary evidence.
Example: A person might skip critical steps in a math problem because they believe they
know the answer without checking their work.
Impact: Overconfidence can lead to errors and ineffective problem-solving.
Creative problem solving involves thinking outside the box and finding novel ways to approach or
resolve a challenge. Creativity plays a crucial role in overcoming cognitive blocks and coming up with
solutions that others might not consider.
Divergent thinking is the process of generating many possible solutions to a problem, rather than
focusing on a single, predetermined solution. It encourages flexibility and originality.
In contrast to divergent thinking, convergent thinking focuses on narrowing down the potential
solutions to find the most effective one. It is the process of evaluating and refining ideas to select the
best solution.
Example: After brainstorming many possible approaches to a problem, selecting the one that
seems most feasible and effective.
Advantages: Ensures that the most practical and effective solution is chosen.
Limitations: May limit creativity by focusing too quickly on one solution.
Analogical thinking involves transferring knowledge from one domain to solve problems in another.
It is the process of drawing parallels between similar problems in different contexts.
Example: Using strategies from a successful business venture to solve problems in a new
industry.
Advantages: Allows for novel approaches based on prior experiences.
Limitations: Analogies may not always align perfectly with the new context.
Cognitive processes, including problem-solving, memory, perception, and categorization, are often
influenced by the cultural context in which individuals live. Different cultures shape the ways in
which people approach problems, categorize information, and organize knowledge.
Perception—the process of interpreting sensory information—is not universal but shaped by cultural
influences. Cultural norms and experiences affect how people perceive the world around them,
leading to variations in perception across different cultures.
Example: People from Western cultures may focus more on individual objects, whereas
people from East Asian cultures may focus on the relationships and context between
objects.
Implication: These cultural differences in perception suggest that cognition is not an
isolated, universal process but is deeply influenced by cultural contexts.
Memory processes—how information is encoded, stored, and retrieved—are also shaped by cultural
contexts. Cultures differ in what they consider important to remember, how they organize
knowledge, and how they retrieve information.
Example: In individualistic cultures, people tend to focus on personal memory (e.g.,
autobiographical memory), while in collectivist cultures, memory may focus more on family
or group experiences.
Implication: The ways people categorize memories, and the importance they place on
specific types of memories, reflect cultural values.
Categorization is the process of grouping objects, ideas, or experiences based on shared attributes.
Cultures influence the way individuals categorize and organize their environment.
Example: Western cultures often categorize animals based on taxonomy (e.g., lions, tigers,
and bears as big cats), while some Asian cultures may categorize animals based on their
symbolic meanings (e.g., elephants as symbols of power).
Implication: Cultural context influences the conceptualization of categories and the way
people mentally organize the world.