Psych Key science skills Flashcards
What is an extraneous variable?
Any variable that is not the IV which may have an affect on the dv
What is a confounding variable
confounding variable is a variable in the research which is not the main variable of interest but can affect the result of the story
What is a controlled variable
A variable in research (IV) that the researcher controls to ensure it does not intervene with the DV.
Improve validity of study
Type of Extraneous variables
Participant variables
Situational variables
Demand characteristics
Experimenter effect
Placebo effect
Participant variable
personal characters of individuals can affect the dv
Situational variable
external factors which may cause participants results and responses
Demand characteristics
cues in an experiments which may influence the participatns response
placebo effect
change in the participants behavior due to the belief they are receiving experimental treatment
Experimenter effect
influence the experimenter may have on the experiment
Sample size and procedures
larger sample size allows for more representative sample, minimizes effects of ev
Experimental design choice
random assignment - equal distribution of ev
compare effects of IV on DV
Counterbalancing
systematically changing orders of treatment/task in a balanced way to reduce/avoid the unwanted effect on performance
Placebo
A fake treatment similar to IV was used in the experimental group but is neutral and have no known effect
Single-blind procedures
Keep participants unaware of the experimental conditions they are in
double-blind procedures
keep both experimenter and participants unaware of the experimental conditions they are in
Standardised procedures
Consistency - experience the same experimental conditions
Replicability - confirm validity of research findings
Controlled variables
Isolator effect - isolate effect of IV on DV
Replicability - confirm validity of research findings
Hypothesis writing structure
It is intended that <participants> who <IV> will have a <higher/lower> <DV> compared to those that <IV></IV></DV></IV></participants>
Population
Entire groups of research interest from which a sample is drawn and the researcher will seek to generalise the results
Sample
Subset/part of the population that is selected for research purposes
Controlled experiment
One/or more IV is manipulated while controlling EV to observe the DV
Correlational study
Identify and measure the association between 2 or more variables without manipulation
Case study
Focuses on detailed investigation group utilises multiple sources of data
Classification and identification
categorizing and recognizing the attributes, properties
Product, process/system developments
A systematic approach to improve process system
Simulation
Uses computerized models/representation to mirror real-world systems
Fieldwork
Collecting data, experiments, and observations directly linked to the experiment