EXER 432 Midterm
a research hypothesis
is directly testable
To calculate L for a correlation of two sets of ranked scores, the degrees of freedom (N - 1) are multiplied by
r square
A researcher predicts that there will be a positive relationship between attitude scores and grade point average. This is an example of a
research hypothesis
The researcher's statement that "the boys in the adventure program will make significantly greater gains in self-concept than the boys in the control group" is an example of a(n)
research hypothesis
References to books should include
author, date, title, city of publication, publisher's name
For a group of normally distributed scores with a mean of 30 and a standard deviation of 6, the middle 68% of the scores will be between
24 and 36
A study involves the comparison of two instructional methods on achievement in math. Two classrooms are used; one method is administered in each classroom. The researcher notices that the pretest scores show differences between the two groups. To control for the influence of the pretest scores on the posttest scores, the researcher should use
ANCOVA
In evaluating the methods section of a research report, which is a very important question to keep in mind?
Did the author provide enough information that the study could be repeated?
Which one of the following statements about dual publication is not true?
Dual publication is permissible if the two journals are in different languages (e.g., published in different countries).
The use of intraclass correlation to estimate reliability in motor performance instead of Pearson r has the advantage(s) of
a and b
A main disadvantage of nonparametric techniques that has frequently been stated (although there is some disagreement with this claim) is that they
are not as powerful (less likely to detect a false null hypothesis) as parametric techniques
A physical education teacher develops a skill test in volleyball. After administering the test to 50 students, she asks the volleyball coach to rate the students on volleyball skills. She then correlates the students' test scores with the coach's rating. This is an example of what type of validity?
criterion validity
A researcher wishes to determine whether a treatment group made a significant improvement from the pretest (M = 25) to the posttest (M = 30). The correct statistical test to use to compare the two means is the
dependent t test
A measure of meaningfulness that expresses the difference between the experimental and control group in standard deviation units is the
effect size
A researcher decides to use an alpha of .01 and a power of .80. To determine the needed sample size the researcher must ascertain the expected
effect size
A good beginning point in a literature search for the student with a very limited knowledge about a topic is
encyclopedias, textbooks, and literature reviews
In multiple regression, one is able to predict
one criterion from two or more predictors
Which of the following terms least belongs with the others?
standard deviation
A researcher used a t test to compare treatments and obtained a t of 3.45. One group had 48 participants, and the other group had 40. The table value for significance at the .01 level was 2.64. Which of the following is the correct way to express these results?
t(86) = 3.45, p < .01
A chi-square analysis compares the responses to a question on recreational preferences of males and females at three grade levels. The resulting two-way classification structure is called
contingency table
A correlational technique frequently used in the construction of an instrument (such as an attitude inventory) that statistically groups test items that seem to be measuring a particular dimension or trait is called
factor analysis
If two measures have a high positive correlation, and a person has a low score on one measure, her score on the other measure is most likely to be
low
The introduction to a research report should
move from a general description of the theoretical problem to the specific area to be studied
Discriminant analysis differs from simple ANOVA such that discriminant analysis has
one independent variable and two or more dependent variables
If a thermometer measured the temperature in an oven as 400° five days in a row when the temperature was actually 337°, this measuring instrument would be considered
reliable but not valid
If ANOVA has found a significant difference among four treatment groups, a follow-up test such as the Scheffé is needed to determine
which of the groups differ significantly from the others
At the end of a well-written introduction, the reader should be able to predict the
statement of the problem (purpose of study)
With regard to capitalization only in APA style, which of these references is/are correct?
(Book) Plagenhoef, S. C. Patterns of human motion (Journal) Cassell, J. Ethical patterns in fieldwork. American Educational Research Journal (Journal) Miller, S. I. Defining Educational Policy Studies as a Field. Educational Studies (a and b)
A teacher wishes to determine the reliability of three trials on a performance test. He uses ANOVA to obtain the reliability coefficient. This technique is called
intraclass correlation
The standard deviation represents the
spread of scores about the mean
The determining factor in the order of authorship of a research publication is that the first author is the person who
develops the idea and plans the research
In the instruments part of the methods section, the author should include a description of the
test characteristics of validity and reliability
In a study designed to assess the comparative effectiveness of two workbooks used in teaching students about laboratory procedures, the independent variable of the study would be
workbooks
A predictive validity technique involving the construction of a two-way grid of percentages of students at different levels of an aptitude test who achieved different grades is called
an expectancy table
Of the following, which is a nonparametric statistical test?
contingency coefficient
A two-way (factorial) ANOVA with more than one person per cell will yield F values for which of following contrasts?
three F values, one each for rows, columns, and interaction
In an item analysis, 14 of the 20 high-ability students answered an item correctly, whereas only 8 of the 20 low-ability students did. What is the discrimination index for this item?
.30
The primary sources of a literature review are
Research journal articles
Reliability of a measure may be established by
a and b only
The single score that best represents all the scores in a distribution is the definition of
central tendency
A correlation of .00 between two variables indicates
independence (no association) between the variables
A researcher finds a correlation of .70 between popularity ratings and self-concept scores. What percentage of common association can be inferred between the two variables?
49%
a null hypothesis is
a statistical hypothesis that assumes that there is no difference among the effects of treatments
Compared to applied research, basic research
usually offers more control, such as that done in a laboratory questions cannot be easily answered
Use of a one-tailed versus a two-tailed test of significance of the difference between two sample means depends on
whether the difference is expected to be in one direction only
The maximum value of item discrimination in norm-referenced test items occurs when the item difficulty is
.50
For a predicted score of 30 and a standard error of estimate of 6, the chances are 95 out of 100 that the true score will be between
18 and 42
A researcher wishes to know whether there is a significant difference in the number of knee injuries reported among four sports. How many degrees of freedom are there for this chi-square analysis?
3
The researcher obtained a significant F from the ANOVA. Omega squared was found to be .30. This is interpreted to mean that
30% of the total variance is accounted for by the treatments
What is the median score for the following set of numbers? (3, 11, 8, 13, 5, 3, 6)
6
Three levels of a treatment variable were evaluated for males and females on three dependent variables. A significant F is reported for the interaction of treatment and gender on a linear composite of the three dependent variables. Which statistical analysis was used?
MANOVA
Which hypothesis is stated in the null form?
There is no difference between the vocabulary scores of average- and high-ability students.
A report of a research study submitted for a four-chapter thesis and the same study prepared for a journal differ with respect to the length of the
a and b (introduction and review of the literature and description of the methods)
In describing participants in the methods section of a research report, which of the following should be included?
a and c (number of participants and pertinent descriptive characteristics of participants)
This question pertains to the following study: "A researcher wishes to determine the effects of an outdoor adventure summer camp on the self-concept of inner-city boys. Boys are randomly assigned to the summer camp and to a control situation. The experimental treatment is for three months. A secondary purpose is to see if age (ages 6, 9, and 12) affects the relationship of the camp effects and self-concept." The independent variable is
adventure summer camp
For scores from a test to have good content validity, the following statement(s) must be true:
b and c only (The test is highly correlated with the final grade in the course. The test adequately samples what was covered in the course.)
The accuracy with which a 12-min run estimates maximal oxygen consumption in a group of male high school seniors represents
concurrent validity
The author of a test of anxiety proceeds on the premise, based on the literature, that the performance of people with high anxiety suffers when they are under stress. In an experiment, the author finds that people who scored as highly anxious on the test performed more poorly on a stressful task. The test author maintained that this finding was evidence of what kind of validity?
construct
This question pertains to the following study: "A researcher wishes to determine the effects of an outdoor adventure summer camp on the self-concept of inner-city boys. Boys are randomly assigned to the summer camp and to a control situation. The experimental treatment is for three months. A secondary purpose is to see if age (ages 6, 9, and 12) affects the relationship of the camp effects and self-concept." The number of participants, the selection of the self-concept inventory, and the length of the study are all examples of
delimitations
An important principle set forth by the American Psychological Association is the right of informed consent, which states that the researcher is obligated to
explain the major features of the study to the participants before the beginning of the study so that they have the opportunity to decline to take part
The generalizability of the results pertains to what kind of validity?
external
A threat to the validity of rating scales is that the rater may tend to let her previous knowledge of the student in another capacity (e.g., another course) influence the rating. This threat is called the
halo effect
A researcher conducts a study on the effectiveness of computer-assisted instruction (CAI) by comparing classes that use this method with classes that do not. The researcher expects the CAI classes to show higher gains in achievement. This expectation is
hypothesis
When a tester divides the number of students who answered a test item correctly by the number of students who attempted the item, the result is called
index of difficultly
The property of a distribution of scores that relates to how peaked or flat the curve is called
kurtosis
This question pertains to the following study: "A researcher wishes to determine the effects of an outdoor adventure summer camp on the self-concept of inner-city boys. Boys are randomly assigned to the summer camp and to a control situation. The experimental treatment is for three months. A secondary purpose is to see if age (ages 6, 9, and 12) affects the relationship of the camp effects and self-concept." The researcher states that he is aware that responses to questions on a self-concept scale may not always be what the person really believes. This is an example of a(n)
limitation
If there is a correlation of .80 between a test of scholastic aptitude and performance on an achievement test, one can infer that
no causation can be inferred
This question pertains to the following study: "A researcher wishes to determine the effects of an outdoor adventure summer camp on the self-concept of inner-city boys. Boys are randomly assigned to the summer camp and to a control situation. The experimental treatment is for three months. A secondary purpose is to see if age (ages 6, 9, and 12) affects the relationship of the camp effects and self-concept." The researcher states that self-concept is represented by scores on the Tennessee Self Concept Scale. This is an example of a(n)
operational definition
Which of the following statements would appear in the procedures part of the methods section of a research report?
participants in the experimental group exercised three days per week for 30 minutes per day for 10 weeks
In which part of the methods section should you expect to find information about when the participants were tested?
procedures
The type of scale that uses items such as "Worthless-Valuable" is called a
semantic differential scale
The term that describes the position of the hump in the curve of a distribution is
skewness
To determine whether data are normally distributed, one can test to see whether the curve is shifted to the left or right. This shift is called
skewness
After a population of 1,000 high school seniors is divided by sex and size of school attended, the random selection of a sample to represent these proportions of the population is called
stratified random sampling
an operational definition of human intelligence is
those characteristics that are measured by the Wechsler Intelligence Scale for Children
When a researcher claims that there is a difference between treatments (i.e., rejects the null hypothesis) when there really is no difference, what type of error is this?
type 1 error
Which of these statements is/are true concerning the "significance of the study" section in the introduction of a thesis?
all of the above (the section should have continuity with the introduction, the section should point out conflicts with previous research, the section should describe gaps in previous knowledge relative to the study)
A researcher sought to find out which of two exercises was more effective in building endurance. One group used exercise A, and another group used exercise B. At the end of study, the researcher should compare the two groups' scores by
an independent t test
The premise that the scores from the Minnesota Attitude Inventory are a valid measure of attitude toward school is an example of a
basic assumption
This question pertains to the following study: "A researcher wishes to determine the effects of an outdoor adventure summer camp on the self-concept of inner-city boys. Boys are randomly assigned to the summer camp and to a control situation. The experimental treatment is for three months. A secondary purpose is to see if age (ages 6, 9, and 12) affects the relationship of the camp effects and self-concept." The researcher is proceeding on the belief that self-concept can be changed in a summer (three months). This is an example of a(n)
basic assumption
Which of the following is a technique for providing information about the reliability of an instrument?
coefficient alpha
When we say that research is empirical, we mean that the researcher
collects data on which to base decisions solves the problems through rationalization controls all extraneous variables
Comparing test items with the course objectives (course topics) checks which type of validity?
content
The only type of research that can manipulate treatments and establish a cause and effect is
experimental research
The term that denotes using ideas, writings, or drawings of others as your own is
plagiarism
This question pertains to the following study: "A researcher wishes to determine the effects of an outdoor adventure summer camp on the self-concept of inner-city boys. Boys are randomly assigned to the summer camp and to a control situation. The experimental treatment is for three months. A secondary purpose is to see if age (ages 6, 9, and 12) affects the relationship of the camp effects and self-concept." The dependent variable is
self-concept
After receiving approval from the university committee on the use of humans as research participants (Institutional Review Board), the researcher
should include a description of this compliance in the methods section of the thesis or dissertation.
When a researcher decides that an appropriate analysis for a research model is to evaluate how several variables might influence two other variables that in turn influence the outcome variable of interest, the appropriate statistical analysis is
structural equation modeling
Which of the following is not a common error in the review of literature sections of theses?
synthesizing and interpreting the findings of previous research giving an article-by-article presentation
A researcher wishes to survey student opinions on a proposed increase in fees at her university. She decides to select a sample for telephone interviewing by selecting every 20th name in the student directory. What is this type of sampling called?
systematic