PSYC 510
HOMEWORK: T B S D AWO-GROUP ETWEEN UBJECTS ESIGN SSIGNMENT
INSTRUCTIONS
OVERVIEW
This is designed to assess yourHomework:Two-Group Between Subjects Design Assignment
understanding of the concepts and applications covered thus far in PSYC 510: Research Methods
and Statistics in Psychology I. Concepts specific to this module include fundamental
considerations for all parametric tests, such as threats to validity, reducing confounding
variables, assumptions for parametric tests. This Homework:Two-Group Between Subjects
Design Assignment also assesses your ability to conduct and interpret the independent samples
ttest using professional conventions. Knowledge from this module will serve as a foundation for
future concepts. These topics also strengthen your ability to critically evaluate whether research
is conducted in a reliable and valid manner in professional and non-professional settings.
INSTRUCTIONS
Be sure you have reviewed this module’s before completing this Learn section
Homework:Two-Group Between Subjects Design Assignment. This Homework:Two-Group
Between Subjects Design Assignment is worth 60 points. Each question is worth 3 points. Six
points are awarded for mechanics/structure.
Part I contains general concepts from this module’s . Learn section
Part II requires use of SPSS. You will have to take screen shots and/or copy and paste from
your SPSS to place answers within this file. Make sure you only insert relevant and legible
images.
Part III is the cumulative section. These may include short answer and/or use of SPSS but
will review material from previous module(s).
Directions for each subsection are provided in the top of each table (in the blue shaded
areas).
Answers should be placed where indicated (wherever there is “ANSWER”).
Submit the file as a WORD document (.doc or .docx). Make sure the filename of your
submission includes your full name, course and section.
oExample: HW7_JohnDoe_510B01
Make sure to check the before beginning this Homework Grading Rubric Homework:Two-
Group Between Subjects Design Assignment.
Part I: General Concepts
These questions are based on the concepts covered in this module’s Learn section.
Answer the following questions using your own words.
1. What are some advantages and disadvantages in the use of a posttest-only control group design
versus a pretest/posttest control group design? (Must identify at least one advantage and one
disadvantage per design – so four total).
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PSYC 510
The two advantages of using a posttest-only control group design as compared to a pretest/posttest control group
design include the random selection of sample participants which ensures diversity and solid internal validity. The
two disadvantages include the lack of pretest and the high probability of confounds.
The two advantages of using a pretest/posttest control group design include equal grouping of participants before
administering the independent variable and capturing measurements before and after the experiment. The two
disadvantages include reactivity risk and high influence of researcher on the participants.
2. What is a confound and how is it related to internal validity?
