Quiz 2 Flashcards
Height and weight are positively correlated. This means that:
-There is no relationship between height and weight
-Usually, the shorter someone is, the heavier they are
-As height increases, typically weight increases
-Usually, the taller someone is, the thinner they are
As height increases, typically weight increases
The laboratory environment is designed to:
-Minimize the use of animals in psychological research
-Re-create psychological forces under controlled conditions
-Re-create psychological forces under random conditions
-Re-create the conditions of everyday life
Re-create psychological forces under controlled conditions
The correlation coefficient indicates the weakest relationship when?
-It is positive
-It is negative
-It is closest to -1
-It is closest to 0
It’s closest to 0
In order for a study to be considered an experiment, there must be both random assignment of subjects/participants to groups, and ________.
manipulation of an independent variable
If the variability of a score is __________ the score average is a more reliable measures of the average score in the population.
Positive
Low
Negative
High
Low
Which of the three measures of variability is most easily distorted by a few large or very small scores?
-Range
-Standard devation
-Variance
-They are all equally vulnerable to distortion from atypical scores
Range
Operational definition is?
-A precise definition that describe the behaviours that make up a construct
-A definition of the statistical procedures that will be used in the research study
-A definition of a variable in terms of precisely how it is to be measured
-A precise definition that describe the relation between the construct being studies and other constructs
A definition of a variable in terms of precisely how it is to be measured
Coding systems are used:
-to record reaction times.
-to determine the levels of behaviour.
-to determine the cause of a behaviour.
-to record different categories of behaviour.
To record different categories of behaviour
A ______________ provides a visual representation of the direction and the strength of a relationship between two variables.
-Plot
-Histogram
-Graph
-Scatterplot
Scatterplot
An advantage of the experimental method in psychology is?
-That the surroundings are always similar to real life experiences
-The identification of a cause-effect relationship
-Similar to the correlational method in that causality is determined
-That is an informal way to investigate behavior
The identification of cause-effect relationship
Students who do better in high school tend to do better in college. This is an example of?
A positive correlation
The ________ is controlled by the experimenter, while the ________ represents the information collected and statistically analyzed by the experimenter:
-Experiment bias; dependent variable
-Independent variable; placebo effect
-Dependent variable; independent variable
-Independent variable; dependent variable
independant variable; dependant variable
Sometimes, researchers will administer a(n) ________ to participants in the control group to control for the effects that participant expectation might have on the experiment:
-Independent variable
-Dependent variable
-Placebo
-Debrief
placebo
In a double-blind procedure:
-Only the parcipants know whether they are in the control group or the experimental group
-Experimental and control group members will be carefully matched for age and gender
-Neither the participants nor the researcher knows who is in the experimental group or control group
-Someone separates from the researcher will ask people to volunteer for the experimental group or the control group
Neither the participants nor the researcher knows who is in the experimental group or control group
Using existing records to try to answer a research question is
-Archival research
-Naturalistic observation
-Survey research
-Longitudinal research
Archival research
In order to summarize or organize a series of observations in some meaningful way, psychologists may develop?
-Theories
-Surveys
-Experiments
-Hypotheses
Theories
Which of the following involves observing behaviour in individuals in their natural environment?
-Survey
-Naturalistic observation
-Archival research
-Case studies
Naturalistic Observation
In an experiment to find out if taking ginseng increases IQ scores, the IQ scores would be?
-A control variable
-The independent variable
-The dependent variable
-An external variable
The Dependant variable
_______________ helps minimize pre-existing differences between experimental and control groups.
Random assignment
The null hypothesis states that:
-There is a relationship between two variables in the population and the relationship in the sample reflects this relationship in the population
-There is no relationship between two variables in the population and the relationship in the sample reflects only sampling error
-There is no relationship between two variables in the population and the relationship in the sample reflect measurement error
-There is a relationship between two variables in the population and the relationship in the sample reflects sampling error
There is no relationship between two variables in the population and the relationship in the same reflects only sampling error
Which of the three measures of central tendency is most easily distorted by a few large or very small scores?
Mean
By using random assignment, researchers are able to control for ________, which are other factors besides the independent variable(s) that may influence research results.
Confounding variable
Acquiring knowledge through observations and experience refers to?
Empiricism
A common method for selecting representative samples is to select them?
Randomly from the larger population
