Midterm test Flashcards
What are the 7 steps in scientific method?
Construct a theory, Hypothesis, Research method/design, Collect data, Analyse data, Report findings, Revise theory.
Who is the experimental group?
Group that receives the variable being tested
Who is the control group?
Group that does not receive the variant being tested.
What is the practice effect?
A natural improvement without the actual help of the variant being tested.
What is the confounding variable
A factor other than the one being studied that can have an effect on the results
What is the placebo effect? What can be the solution?
Expectations that participants have might affect could affect the results. Instead, experimenter can give a mock treatment so neither group knows if they are control or experimental group
Experiment Bias. Solution?
Actions made by the experimenter that could affect the results by accident. So, it’s better that the experimenter doesn’t know which group the participants belong to.
Why is average not very reliable
It is very susceptible to outliers( a low result can change the whole result)
Median
center value in a data set when it’s arranged numerically
What is type 1 error
Believing a difference when it doesn’t exist
What is type 2 error
Conclude there is no difference even though there is.
Definition of correlation
Measures the strength of a relationship between two variables
Correlation coefficient
number between -1 and +1 indicating the strength and direction of the correlation
What does it men when the p-value is greater than 0.05?
The results are not significant, meaning that there is a greater than 5% probability that the results are due to chance
What is a within participant design?
Participants complete both control and experimental manipulations
In between participants
Participants do not typically complete both manipulations (control and experimental)
What happens in double-blind experiments?
Experimenters don’t know who is in experimental group or control group and participants don’t know either
Blind experiments
Experimenters know who is in an experiment or control condition, but participants don’t
T or F: Direct observation is an accurate interpretation of people’s behaviours and intentions
False: Direct observation studies are prone to the subjectivity and interpretation of the experimenter
Random assignment
minimizes pre-existing differences between the groups, allowing us to compare these groups and ensure that the independent variable was responsible for any change in the dependent variable between groups
Random sampling
Method that allows generalization of the whole population
Difference between theory and hypothesis
A theory is a general set of ideas bout how the world works. A hypothesis makes specific predictions about a phenomenon. A hypothesis is a testable testable statement that is guided by theories
Difference between theory and hypothesis
A theory is a general set of ideas bout how the world works. A hypothesis makes specific predictions about a phenomenon. A hypothesis is a testable testable statement that is guided by theories
Contingent relationship
Presentation of one stimulus reliably leads to the presentation of another (signal and event
Unconditioned stimulus (US)
automatically triggers a response in the absence of any learning
Unconditioned response( UR)
Response that occurs after stimulus
Conditioned stimulus (CS)
Paired with US to produce a learned contingency
Conditioned Response( CR)
The response that occurs once the contingency between CS and US is learned
Acquisition
Process at which a contingency is learned
Extinction
Presenting the CR alone when CS no longer predicts the US. However, the contingency is not unlearned, it competes with the original one.
Spontaneous recovery
the sudden recovery of a conditional response following a rest period after extinction
Stimulus generalization
The process by which stimuli similar to the CS will elicit a CR
Stimulus discrimination
The fear response by the highest gradient remains intact, but the lower fears flattened.