instructions;INSTRUCTIONS: Take-Home Assignment (2030 N) – worth 10%DUE DATE: THIS ASSIGNMENT MUST BE SUBMITTED IN CLASS ON
FRIDAY, MARCH 18.
If the assignment is submitted AFTER class but on March 18, you will lose 5/48
marks. If it is submitted on Monday, Mar 21, you will lose 10/48 marks.
Assignments will NOT be accepted after Mon, Mar 21.
Late assignments should be handed in to my secretary, Agnes, in Rm 281 BSB and it
must be date-stamped. Do NOT leave your assignment under my office door or any
other office door!
If you are ill and do not come to class, email the assignment to your TA so that she
knows it was completed. Then, hand in the hard copy along with medical
documentation asap to my secretary in Rm 281 BSB. The TA will check to ensure
that both copies are identical and that nothing was altered. Do NOT email your
assignment to your TA just because you don’t want to come to class.
YOU ARE EXPECTED TO WORK ON THIS ASSIGNMENT INDEPENDENTLY!!!!.
This assignment consists of two parts: Part 1 – library exercises and Part 2 -exercises
involving the application of research methods concepts that we have covered.
COVER PAGE: The cover page should say:
-2030N Assignment (Jubis)
– your name and student #
-the name of your TA
-date
Make sure your assignment is stapled!!!! (We don’t provide paper clips)
Part 1 – Library Exercise
To answer Question #1 you will need to use a pair of “key words” to perform a library
search. The two key words assigned to you are determined by the first letter of your
surname as shown below. For instance, if your last name begins with “D”, you must use
“arousal” and “attention” as your two key words for searching the required information.
A-B : schizophrenia and environment
C-F: arousal and attention
G-H: sleep and cognitive task
I-K: altruism and emergency
L-M: imagery and word recall
N-P: intelligence and birth order
Q-S: romantic love and culture
T-Z: exercise and mental health
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PART 1 – Answer the following two questions. Please print or type your answers.
You don’t have to submit the question portion of the assignment, but if you submit
your answers only, be SURE that they are properly labeled so that it’s obvious what
questions they belong to.
Your two key words are:
____________________________ and___________________________
#1a) Using PsycInfo and your two assigned key words, give APA formatted references
for two scholarly journal articles that include both of these concepts and attach the first
page of each
article. One article must be published between 1998 and 2002, and the other must
be published between 2004 and 2016. (Write “Question 1a” at the top of each of these
two pages so that it’s obvious what question these pages pertain to).
Reference 1:
Reference 2:
b) What subject terms does PsycInfo provide for the two articles you found in 1a
(above)?
Reference 1:
Reference 2:
c) Consult the reference section for one of your articles in 1a (above) and select a journal
article from its reference section, that is available through York Libraries. Attach the first
page of that article. (Write “Question 1c” at the top of the article page so that it’s
obvious what question this page pertains to).
d) Give one reference in APA format for a book that is focused to a great extent on these
two key words and provide the library call number (any publication date is acceptable).
Reference:
Call Number:
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#2. Consider the APA-formatted citation below and circle the correct answer to the
question.
Haines, R. T., & Mueller, C. E. (2013). Academic achievement: An adolescent
perspective. In J. Hattie & E. M. Anderman (Eds.), International guide to student
achievement (pp. 10-12). New York: Routledge.
The above citation is for a
a) chapter or essay in an edited book
b) journal article
c) book
d) dissertation
PART 2. – Answer the following six questions. Please type or print your answers.
You don’t have to submit the question portion of the assignment, but if you submit
your answers only, be SURE that they are properly labeled so that it’s obvious what
questions they belong to.
1) A researcher is interested in the effects of “ambiguity” and “number of bystanders”
on helping behavior. Subjects filled out a questionnaire in a room with 0, 2, or 4 other
people who were confederates of the experimenter. After distributing the questionnaire,
the experimenter went in the next room. Five minutes later, there was a loud crash,
possibly caused by the experimenter falling. For half of the subjects, the experimenter
unambiguously (explicitly) called out that he needed help. The situation was more
ambiguous for the other half of the subjects because the experimenter said nothing after
the loud crash. The experimenter measured how long it took (in seconds) before subjects
offered to help and the mean times were as follows:
0 bystanders, ambiguous 12secs
2 bystanders, ambiguous 11secs
4 bystanders, ambiguous 11secs
0 bystanders, unambiguous 20secs
2 bystanders, unambiguous 16secs
4 bystanders, unambiguous 10secs
For the purpose of the exercise, assume that a difference of “2 or more” between any of
the row, column or cell means is a significant difference.
a) Place the data into correct cells of a factorial matrix and provide row and column
means (you can do this by hand).
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b) Draw a fully-labeled line graph of the results. Put the “# of bystanders” on the x-axis.
(A hand-drawn graph is acceptable).
c) Is there a main effect for “number of bystanders”? _______
d) Is there a main effect for “ambiguity”? ________
e) Is there an interaction effect? ________
f) Give a verbal description of all of the effects that you found.
2) For each of the following, use the available information to determine how many
participants will be needed to complete the study (if some questions are unanswerable
without further information, simply say so):
a) A 2×2 mixed factorial; cell A1B1 needs 20 subjects. _________

b) A 3×4 repeated-measures factorial; cell A1B1 needs 10 subjects. ________
c) A 2x3x3 independent groups factorial; cell A1B1C1 needs 5 subjects. ________
d) A 2×3 mixed factorial; cell A1B1 needs 10 subjects. _________
e) A 2(A) x 3(B) x 3(C) mixed factorial, where A and B are within-subject factors and C
is a between-subject factor; cell A1B1C1 needs 10 subjects. _________

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3) Eighty male subjects, who were required to be proficient in the English language, were
randomly assigned to one “payment wait period” (They were told in advance how much
time they would have to wait for their payment for participating in this study). Group 1
was to be paid immediately following the study, Group 2 had to wait for 1 week, Group
3 had to wait for 2 weeks, and Group 4 had to wait for 3 weeks. All subjects performed
both a 20-word recall task and a 40-word recall task. The experimenter measured the
number of words recalled.
a) Identify one independent variable (I.V.)._____________________________
b) Identify the number of levels of this I.V. ____________
c) Is this I.V. a between-subjects or within-subjects variable? _____________________
d) Is this I.V. a manipulated or a subject variable? ______________________________
Answer the following 4 questions only if there is a second I.V.
e) Identify the independent variable (I.V.)._______________________________
f) Identify the number of levels of this I.V. ____________
g) Is this I.V. a between-subjects or within-subjects variable? _____________________
h) Is this I.V. a manipulated or a subject variable? ______________________________
i) If appropriate, identify the “factorial notation “ for this study. _____________
j) Identify the name of this study’s design. _________________________________
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4) Consider an experiment in which 2 independent variables have been manipulated.
Variable A has 3 levels, and Variable B has 2 levels.
Draw one line graph that shows a main effect of Variable B, but no main effect of
Variable A and no interaction effect. Put Variable A on the x-axis.
5) A researcher studied the effects of training (untrained and trained) and problem
difficulty (easy or difficult) on subjects’ problem-solving ability. She hypothesized that
training (compared to no training) would enhance performance on both the easy and the
difficult tasks. The data presented below represent the percentage of problems that
subjects solved in each of the four conditions.
Training
Problem difficulty untrained trained
easy 95 95
difficult 30 60
Is there an interaction effect? If so, explain your answer. (Assume that any differences are
statistically significant).
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6) Briefly list any flaws in the following study. Make use of the information that is
actually reported; don’t make any assumptions about information that wasn’t reported.
Assume that correct statistics were used. Answering in point-form is acceptable.
Several years ago, Pepsi decided that Coke’s lead in Toronto was no longer acceptable so they
decided to conduct a taste preference study. Participants were chosen from Coke drinkers in the
Toronto area and they were asked whether they preferred the glass of Coke or glass of Pepsi.
To help prevent any bias, the glasses were not labeled “Coke” or “Pepsi”. Instead, the Coke
glass was marked with an “O” and the Pepsi glass marked with a “T”. All participants sampled
the “T” glass first. Results showed that over half of the subjects chose Pepsi over Coke, and
researchers concluded that Canadians preferred Pepsi over C