Bus310 test 3
The following scale type is called: Ugly 1 2 3 4 5 Beautiful
A semantic differential scale
What is the least reliable and least efficient probability sampling technique?
Cluster Sampling
When a researcher is concerned about the extent to which an instrument adequately measures a concept, he is concerned about:
Concurrent validity
A Quasi-Experimental Design guarantees the maximum internal and external validity, ruling out many other rival hypotheses.
F
A Quasi-Experimental Design measures true cause-and-effect relationships.
F
A field study is an experiment done in the natural environment in which work goes on as usual, but treatments are given to one or more groups.
F
A moderator can only be measured on a nominal level.
F
Cause-and-effect inferences can be contaminated by the effects of the passage of time. Such contamination effects are denoted history effects.
F
Concurrent validity is a form of construct validity
F
Discriminant validity is the extent to which experts are of the opinion that an instrument measures what it intended to measure.
F
External validity of lab experiments refers to the confidence we place in the cause-and-effect relationship.
F
From statistical considerations the preference is given to probability sampling over non-probability sampling.
F
Internal validity refers to the extent of generalizability of the results of a causal study to other settings.
F
Manipulation of independent variables in order to unravel causal relationships is unacceptable from a scientific point of view.
F
Non-probability sampling leads to findings that are highly generalizable.
F
Operationalizing is making a variable measurable.
F
Temperature is always measured with an interval scale
F
The bigger the sample size, the better.
F
Major threats to validity in a "pretest & posttest with one experimental group only" are:
History, instrumentation, main testing, interactive testing, mortality.
A disadvantage of cluster sampling is that it:
Is the least efficient form of sampling
What is the scale level of a Likert scale?
Ordinal
With which scale can we, for describing central tendency, determine the mode and the median, but not the mean?
Ordinal scale
Which of the following alternatives is not an example of a rating scale?
Paired comparison
Which of the following sampling designs is a form of non-probability sampling?
Quota Sampling
A sport shooter shoots from a distance of 10 meter 10 times on a cardboard. On this board the middle circle with 12 points has the highest value, and the outer circle with 1 point the lowest. Shooting next to the board yields 0 points. For every 10 shots the points are counted up to a total score. What scale has this total score if the shooter hits the board every time?
Ratio
Which of the following measurement levels provides the most information about a variable?
Ratio
If your objective is to compose a representative sample, what kind of sampling technique would you choose?
Simple Random sampling
As a rule, probability sampling leads to a representative sample.
T
Biases that might affect the internal validity of experimental designs are often reduced by enhancing the level of sophistication of the experimental design.
T
Cluster sampling is the least representative probability sampling design.
T
Cronbach's alpha can only be calculated for a variable that is measured with multiple items.
T
If a sample is subdivided into subsamples, a minimal sample size of 30 is necessary for every subsample.
T
Interval and ratio variables are also called metric variables.
T
Quasi-Experimental Designs expose an experimental group to a treatment and measure its effects.
T
Simple random sampling is a method associated with a high degree of generalizability.
T
Snowball sampling and Quota sampling are both non-probability sampling techniques.
T
The construct 'hunger' is a typical example of a construct that must be operationalized because it is an abstract and subjective concept.
T
The manipulation of the independent variable is also known as the treatment, and the results of the treatment are called treatment effects.
T
There is a trade-off between internal validity and external validity. If we want high internal validity, we should be willing to settle for lower external validity and vice versa.
T
Robert weighs himself on a bathroom scale three times in a period of 5 minutes. The first time he weighs 17 lbs, the second time he weighs 15 lbs and the third time he weighs 23 lbs. What conclusion can we draw based on this information on the pair of scales?
The scale is not reliable and not valid
A scale is __________ if it measures what it should be measuring
Valid