Research methods Flashcards
Independent measures
Two separate groups of participants experience two different conditions of the experiment (one each)
Matched pair
Participants are paired together on a variable scale that are relevant to the experiment (e.g IQ) One takes part in condition 1 and the other takes part in condition 2
Repeated measures
All participants experience both conditions of the experiments. Each participant would first take part in condition A then then condition B
Alternative hypotesis
A testable statement which predicts the independent variable will have an impact on the dependent variable
Null hypothesis
A testable statement which predicts the independent variable will have no impact on the dependent variable
GRAVE
Generalisability
Reliability
Applicability
Validity
Ethics
Case study
An in depth investigation of an individual or small group of people.
Uses a range of research methods which allow detailed data to be collected
Is a case study non-experimental or experimental method
Non-experimental as it does not manipulate an independent variable directy
Examples of ways to research on research methods
Observations, Questionnaires, Medical assessments, Medical history, Interviews, Family/friends
Triangulation
Gathering of data from two or more research methods to draw a more valid conclusion
Also prevents researcher bias
Laboratory experiments
A research method which measures participants performance in two or more conditions. It is a way to determine whether one factor (variable) affects another.
It takes part in a controlled environment
What happens in a lab experiment
The independent variable is manipulated and the dependent variable is measured and all other variables are controlled
Strength and weakness of a laboratory expirement
Strength - It’s a controlled environment so no extranous variables
Weakness - Demand characteristics may show as they know they’ll be tested
Field experiment
An experiment which takes place in a natural experiment so it’s not controlled
The researcher manipulates the independent variable and measures the dependent variable
However, there are extraneous variables but not as much as a lab experiment because the environment is more unpredictable
Participants may or may not know they are being studied
Stength and weakness of field experiments
Strength - Have higher mundane realism because they are conducted in naturalistic environment so the behaviour is natural and less demand characteristics
Valid and Reliable
Weakness - Ethical issues like informed consent
Extranous variables so its less reliable
Mundane
Realism. Describes the degree to which the materials and prodedures involved in an experiment are similar to events that occur in the real world likr everyday life
Natural experiments
A natural experiment occurs in real life (naturalistic) environment and have a independent variable and dependent variable
The researcher does not manipulate the independent variables it just naturally occurs
They are opportunists so they make a use of unique and naturally occurring situations that would otherwise be difficult or unethical to set up
Strength and weakness of natural experiments
Strength - The environment is real and naturalistic so ecological validilty and no researcher bias
Valid as no demand characteristics
Weakness - Less reliable due to extraneous variables
Quantitative data
+ strenghts and weaknesses
Results that involve numbers and statistics e.g percentages (quantity, numbers)
W - cab be invalid and lack information
S - Quick and easy to get
How are quantitative methods reliable and valid?
The control of experiments, and questions asked in other mehods allow eaiser replication so are more likely to find reliable findings
Designed to gather facts and measure behaviour that can be applied to a target population so that the data is generalisable to others (external validity)
Also avoid researcher bias