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Research method in PT
Significance levels are
The key defining feature of the experimental research is that
Research method in PT
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PT6033
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1
The key defining feature of the experimental research is that
the sample size is usually large
the independent variable is manipulated
a statistical test is performed
the experimental control is stringent
2
Significance levels are
measures of probability of rejecting the Ho
used to compute a p-value
always 0.05
set after the statistical test has been performed
3
I compared effects of TENS on pain reduction between pts post-TKA and post ACL reconstruction
quasi-experimental two groups pre-post
true-experiment two group pre-post
true experiment two-way repeated
quasi-experiment two group post-test only
4
The effect of length of studying on the test score. length of studying is a
confounding variable
attribute variable
dependent variable
Independent variable
5
Based on the result, the researcher should conclude
variance homogeneity is met
data are not normally distributed
data are normally distributed
variance homogeneity is not met
6
I pick a tool with a test-retest ICC = 0.1 to conduct a study. which research validity is threa
Construct validity
Statistical validity
External validity
Internal validity
7
which of the following will produce the largest sampling bias
a small convenient sample
a large snowball sample
a small random sample
a large cluster random sample
8
Based on the description about power, the readers should be aware that
90% of the time the true difference will not be detected
the type I error is high
10% of the time the true difference will not be detected
the type II error is high
9
How many scales are used for measurement?
4
3
1
2
10
My research patient referred his friends from the stroke support group to my study.
simple random sampling
snowball sampling
matched sampling
convenient sampling
11
An interventional trial has a retention rate of 60%. it has a(n) _____resulted from__.
construct validity, lack of power
internal validity, research mortality
external validity, small sample size
internal validity, history
12
the correlation coefficient was "+0.8"
the two variables are not related
as one goes up, the other goes down
as one goes up, the other goes up
the relationship is weak
13
The purpose of stratified sampling is to ensure
the sample proportionately represents the population
everyone has the equal opportunity
the sample will finish the study
the sample represents the population
14
When a p-value is less than the predetermined significance level, we
reject research hypothesis
reject null hypothesis
reject alternative hypothesis
15
"In this double-blinded randomized control trial...."what does double-blinded mean?
This study has low quality
testers are not aware of the group assignment
subjects are not aware of the group assignment
both subjects & tester are not aware of the group assignment
16
Researchers want to answer a research question pertaining to
a target population
world population
a sample
an accessible population
17
What is the primary purpose of conducting a methodological study?
to improve a measurement
to later demonstrate a treatment effect
to publish
to modify an existing tool
18
the standard error of the mean (SEM) is
used to describe the sample
concerned about score consistency across times
large when the sample size is large
important to for inferential statistics
19
During checkout, you work extremely hard if your tester is Dr. Weber becoz you want to impress
diffusion of treatment
regression to mean
observer effect
testing effect
20
which of the following could be described as a nominal scale
location of the clinics
commute time
age
annual income
21
I conducted a parametric test for a set of nominal data. Which research validity is threatened?
Construct
External
Internal
Statistical
22
Using test scores to predict future events is to establish
construct validity
test-retest reliability
content validity
criterion validity
23
A 90-yo pt was observed for 2 wk, then provided with tx & obs. for 3 wk, then obs. only for 2wk
changing criteria
A-B design
Alternating design
withdrawal design
24
Single subject design is a
experimental research
qualitative research
descriptive research
non-experimental research
25
Type II error occurs when
Ho is accepted but it is in fact false
Ho is rejected but it is in fact false.
Ho is accepted but it is in fact true
Ho is rejected but it is in fact true
26
To describe the central tendency of a discrete data, one should use
mode
median
frequency
mean
27
the statistical approach to handle drop-outs is
validity test
regression to mean
intention-to-treat
parametric test
28
comparing test scores between a diseased group and a non-diseased group is to establish
construct validity
concurrent criteria validity
content validity
internal consistency
29
Reliability study helps to determine
measurement sensitivity
measurement accuracy
measurement usefulness
measurement consistency
30
the authors performed a correlation analysis between a standardized test and a new test.
concurrent validity
construct validity
face validity
content validity
31
The effect of TENS and manual therapy on pain reduction in adults with chronic LBP. the design
Two-way factorial
Single-factor pre-post
Two group pre-post
One-way repeated
32
Based on table 2, the readers can conclude that the difference between group was stat. sig.
because p was less than alpha level
because 95% CI was reported
because SE was reported
because p< = .001
33
girls learn better with visual aids and boys learn better with audio cues. there is a(n)___
main effect of gender
interaction between gender and learning method
what?
main effect of learning method
