Exam 2 Practice Test Questions Flashcards
A researcher takes his population, separates into 4 classes by specific characteristics and then takes a random sample from each class. This type of sample is termed which of the following?
proportional stratified sampling
An example of Systematic sampling:
pick a number like 10 by choice not randomly choosing number 10, then choose every 10th person; organized first in a pre-numbered list or alphabetically
Simple random sampling:
population not organized first
Define sampling bias:
Occurs when the individuals selected for a sample overrepresent or underrepresent certain population attributes that are related to the phenomenon under study
For your research you have identified 3 subjects that meet your inclusion criteria and then you ask each subject to recommend another person who also meets the inclusion criteria. You are using which of the following sampling techniques?
Snowball sampling
Research purpose also known as:
Research Objectives (also theses: specific aims, objective, hypothesis, purpose)
Identify a research topic of interest you have in PT:
a TOPIC is a broad area!!! When you get too specific it is a PROBLEM. An example would be patient satisfaction or e-stim
In an experiment study factors that the researcher is unable to control are considered to be which of the following?
Limitations
In order to determine true cause-and-effect between the independent and dependent variables it is important that the instrument of measurement display which of the following characteristics?
Responsiveness
In research, a predictor variable is called the _____ variable, while the outcome variable is called the _____ variable.
independent, dependent
Probability samples are created through what kind of sampling process?
random selection
The null hypothesis also called?
statistical hypothesis
The research hypotheses is defined by which statement?
stating the researcher’s true expectation of results, guiding the interpretation of outcomes and conclusion
- The researcher has stated his hypothesis as the following: “There will be a greater level in perceived learning between students enrolled in online courses than those enrolled in on-campus courses.” This is an example of which of the following types of hypothesis?
Directional hypothesis (independent: teaching techniques)
- The statement “there will be a difference in…”, used in a hypothesis would indicate it is which of the following types of hypotheses?
Nondirectional hypothesis
When a researcher presents his/her results in a presentation or publication, this is considered what?
Primary source
What is considered an operational definition?
Adult is defined as “a subject over the age of 18”
Which of the following statements best describes a population?
The defined aggregate of subjects who meet inclusion criteria
“Measure” is defined as:
an empirical representation of an underlying concept or construct, the numeral or category assigned to an object, event, or person according to pre-set rules
A PT researcher has developed a test for balance and administers the new test at the same time as the Berg Balance Scale to measure which type of validity?
Concurrent validity (test you have is concurrent with the gold standard or other tests that have are known to be valid)
A determination of poor reliability would be made when the reliability coefficient is below what level?
0.5
A researcher is completing a study to validate the cutoff scores from a new test on a different group of subjects, this type of study is termed which of the following?
Cross-validation
Another term for homogeneity in data is which of the following?
Internal consistency
Content validity is measured by which of the following methods?
Panel of experts
