TOPIC ONE: RESEARCH METHODS
Alternative Hypothesis
The hypothesis that states there is a difference between two or more sets of data.
Central Tendency
A statistical measurement attempting to depict the average score in a distribution.
Control Group
The group of participants in an experiment that does not receive the independent variable.
Correlation
The degree to which two or more variables a related to each other. A correlation refers to the direction that the variables move and does not necessarily represent cause and effect. (Example: height and weight are correlated. As one increases, the other tends to increase as well).
Double Blind Study
Research method in which both the participants and the experimenter are unaware or 'blind' to the anticipated results.
Ecological Validity
The extent to which the findings of a study can be generalized to real-world settings.
Experimental Method
Research method using random assignment of participants and the manipulation of variables in order to determine cause and effect.
Experimenter Bias
Errors in a research study due to the predisposed notions or beliefs of the experimenter.
External Validity
The extent to which the data collected from a sample can be generalised to the entire population.
Hypothesis
A prediction about the relationship between two or more variables.
Independent Variable
The variable in an experiment that is manipulated or compared.
Internal Validity
A measure of the trustworthiness of a sample of data. Internal validity looks at the subject, testing, and environment in which the data collection took place.
Longitudinal Study
A research design that assesses the effects of development (maturation) by using the same participants over an extended period of time
Meta Analysis
The statistical procedure used to combine numerous and independent research results into one study. Each research study becomes one subject in the meta-analysis.
Norm
An expectation based on multiple observations.
Null Hypothesis
The hypothesis that states there is no difference between two or more sets of data.
Population
The entire group to which research is hoping to generalise (e.g., males, adults, U.K. citizens).
Random Sample
A group of participants representing the population who are selected through chance.
Range
the difference between the highest and lowest score in a set of scores.
Reconstruction
Tendency to fill in the gaps in our memory and often believe these represent true memories.
Rehearsal
Repeating information in order to improve our recall of this information.
Reliability
A statistical measure of a test’s consistency, or ability to result in similar scores if given repeatedly.
Replication
A good study is one which can be copied by other researchers so that their findings can be checked. This is important for the establishment of reliability.
Representative Sample
A sample or subgroup of the population that possesses the same characteristics of the population
Sample
Portion of the entire population used to estimate what is likely to be happening within a population.
Validity
Statistical technique used to determine if a test is actually measuring what it is intended to measure.
Variable
Any factor which has the potential to influence another factor in a research study.
TOPIC TWO: COGNITIVE PSYCHOLOGY
Amnesia
Loss of memory.
Cognitive Psychology
The sub-field of psychology associated with the mind – memory, language, perception, etc.
Long Term Memory
Relatively permanent memory.
TOPIC THREE: DEVELOPMENTAL PSYCHOLOGY
Attachment
The strong bond a child forms with his or her primary caregiver.
Behaviourism
The school of psychology founded on the premise that behaviour is measurable and can be changed through the application of various behavioural principles.
Critical Period
A time frame deemed highly important in developing in a healthy manner; can be physically, emotionally, behaviorally, or cognitively.
Innate
Occurring without learning, inborn.
Schema
The cognitive structure used to make sense of the world e.g. I have a schema for a restaurant – it contains tables, chairs, menus, etc.
Temperament
A person’s typical way of responding to his or her environment.
Trait
A relatively permanent internal characteristic (e.g., friendly, outgoing).
Unconscious
According to Freud, the area of the mind where unknown wishes and needs are kept that play a significant role in our conscious behaviour.
TOPIC FOUR: PHYSIOLOGICAL PSYCHOLOGY
Anxiety
The physiological and psychological reaction to an expected danger, whether real or imagined.
Autonomic Nervous System
Part of the peripheral nervous system that regulates the involuntary actions of the body (e.g., breathing, heart rate, blood pressure, pupil dilation). Also regulates the Fight or Flight response.
Drug Therapy
The use of medication to treat a mental illness.
Hypothalamus
A part of the brain that controls the autonomic nervous system, and therefore maintains the body’s temperature, weight, etc.