Memory and Cognitive Studies

This page delves into key studies on memory and cognitive processes, providing insights into how information is stored and recalled in the human mind.

Peterson & Peterson's study on short-term memory duration:

• Participants: 24 students
• Method: Recall of trigrams (three-letter sequences) after varying intervals
• Findings: 80% recall after 3 seconds, less than 10% after 18 seconds
• Conclusion: Short-term memory lasts approximately 18 seconds

Highlight: This study is considered reliable and has ecological validity, but it has been criticized for its unnatural environment and lack of diverse participants.

Bartlett's "War of Ghosts" experiment:

• Aim: To test how schemas influence the retelling of unfamiliar stories
• Method: Participants read a Native American story twice and reproduced it after various time intervals
• Findings: Participants made changes to the story, demonstrating the influence of schemas on recall

Definition: Schemas are mental frameworks that help organize and interpret information based on prior knowledge and experiences.

These studies contribute to our understanding of memory processes in cognitive psychology, highlighting the limitations of short-term memory and the role of existing knowledge in shaping recall.

Example: In everyday life, the influence of schemas can be observed when people remember events differently based on their cultural backgrounds or personal experiences.

Psychological Problems and Brain Function

This page explores studies related to psychological problems and brain function, providing insights into the treatment of mental health issues and the relationship between brain structure and behavior.

Young et al.'s study on Cognitive Behavioral Therapy (CBT) for internet addiction:

• Participants: 114 individuals
• Method: Likert-scale questionnaires administered during therapy sessions and follow-up
• Findings: CBT was effective in treating internet addiction, with scores improving over 12 weeks

Vocabulary: Cognitive Behavioral Therapy (CBT) - a type of psychotherapy that focuses on changing negative thought patterns and behaviors

Caspi et al.'s research on genetic predisposition to depression:

• Aim: Investigate why some people are more susceptible to depression after stressful life events
• Method: 847 participants grouped by allele strength of the 5-HTT gene
• Findings: Participants with short 5-HTT gene were more likely to develop depression after stressful events

Highlight: This longitudinal study provides valuable insights into the genetic factors influencing mental health, but ethical concerns arise regarding potential participant deception.

Damasio et al.'s study on Phineas Gage:

• Aim: Investigate brain damage in Phineas Gage using his preserved skull
• Findings: Extensive damage to the frontal lobe, affecting both left and right hemispheres
• Significance: Provides insights into the relationship between brain structure and personality changes

Sperry's split-brain study:

• Participants: Epileptic patients who underwent corpus callosotomy
• Method: Visual and tactile stimuli presented to isolated hemispheres
• Findings: Each hemisphere can function independently when disconnected

Definition: Corpus callosotomy - a surgical procedure that severs the corpus callosum, the main connection between the brain's hemispheres

These studies contribute to our understanding of brain function and neuropsychology, highlighting the complex relationship between brain structure, genetics, and behavior.

Criminal Psychology and Social Influence

This page focuses on studies in criminal psychology and social influence, exploring factors that contribute to aggressive behavior and social dynamics.

Bandura, Ross, and Ross's study on children's modeling of aggression:

• Participants: 72 children divided into three groups (aggressive, non-aggressive, control)
• Method: Children observed adult models interacting with a Bobo doll
• Findings: Children in the aggressive group displayed the most aggressive behavior, with boys showing more aggression than girls

Example: This study demonstrates how children can learn aggressive behaviors through observation, supporting social learning theory.

Charlton et al.'s research on TV's effect on children's aggression:

• Method: Natural study over 5 years, measuring behavior before and after TV introduction
• Findings: No significant change in aggression levels

Highlight: This longitudinal study provides ecological validity but is limited to a single community.

Piliavin et al.'s bystander effect study:

• Setting: New York subway
• Variables: Victim's sobriety, age, and race
• Findings: People were more likely to help in smaller groups, men offered more help, and individuals were more likely to assist those similar to themselves

Vocabulary: Bystander effect - the phenomenon where individuals are less likely to offer help in the presence of other people

Milgram's obedience study:

• Participants: 40 male volunteers
• Method: Participants instructed to administer electric shocks to a confederate
• Aim: Measure obedience to authority figures

These studies in criminal psychology and social influence provide valuable insights into human behavior in various social contexts, contributing to our understanding of aggression, helping behavior, and obedience.

Definition: Social influence refers to the ways in which individuals change their behavior to meet the demands of a social environment.

Page 6: Obedience Studies

Focuses on Milgram's classic obedience experiment and its implications.

Example: Milgram's study involved 40 male participants administering apparent electric shocks.

Highlight: The authority figure wore a lab coat to enhance their perceived authority.

Definition: Obedience to authority refers to following commands from someone in a position of power.

Piaget's Theory and Cognitive Development

Jean Piaget's theory of cognitive development is a cornerstone in understanding how children's thinking evolves. This page introduces the four main stages of cognitive development and highlights key studies related to this theory.

Definition: Cognitive development refers to the progression of mental processes, including thinking, reasoning, and problem-solving abilities.

Piaget's four stages of cognitive development are:

1. Sensorimotor (0-2 years): Infants develop object permanence
2. Pre-operational (2-7 years): Children exhibit animism, egocentrism, and irreversibility
3. Concrete operational (7-11 years): Children develop decentration, reversibility, and conservation
4. Formal operational (12+ years): Adolescents develop abstract and hypothetical thinking

Highlight: Piaget's theory is widely applicable and supported by research, but it has been criticized for not considering cultural differences and individual variations in development.

The Piaget & Inhelder study on egocentrism involved 100 children aged 4-12 years. Using a wooden doll on a three-mountain figure, researchers assessed children's ability to understand perspectives other than their own.

Example: In the study, younger children (4-7 years) often chose pictures representing their own view rather than the doll's perspective, supporting Piaget's concept of egocentrism in the pre-operational stage.

Other relevant theories discussed include:

• Dweck's Mindset Theory: Emphasizes the importance of praising effort over ability to foster a growth mindset
• Willingham's Theory of Practice: Challenges the effectiveness of learning styles in education

Vocabulary: Growth mindset - the belief that abilities can be developed through effort and learning