|
Introduction
The overall purpose of this assignment is to have students thoughtfully
engage in the collection, compilation, analysis, interpretation, and presentation
of 'real-world' data using Microsoft Excel. Due to the time-consuming
nature and complexities of data collection, it is recommended that this
be a group assignment.
This assignment can be tailored to a number of learning communities across
the various concentrations and disciplines, as there are a number of different
options for data collection.
Learning Objectives
- Understand the difference between quantitative and qualitative research
- Understand the strengths and weaknesses of (____insert research model
here___)
- Clearly define constructs and operationalize them
- Understand the role of logical inference
- Appreciate the complexities of the research process, from data collection
to data interpretation
- Use data effectively to support claims
- Present data summaries effectively
- Address strengths and weaknesses of data
Competencies Addressed
Critical thinking, problem-solving, communication, and group interaction.
|
|
I. Conceptualization and Design
The first phase of this particular assignment is for students to generate
key questions, hypotheses, and/or constructs of interest. Small groups
can brainstorm their key questions, hypotheses, and constructs of interest
either in class or in synchronous (e.g., MOO) and/or asynchronous web-based
environments (e.g., TownHall).
II. Data Collection
The data collection phase of this assignment can occur using a number
of different methods. You might choose to have students administer a survey,
conduct an interview, engage in observations, carry out a content analysis,
or use a combination of these methods.
Examples of each of these different data collection strategies include
interviews, observations, content analyses, and surveys. Although different
concerns emerge when using the various strategies, you may want to devote
at least one class period to discussing these various issues and your
expectations of the students.
Remember, in each data collection strategy, students are gathering information
for the purposes of exploring an area of interest, examining a particular
theory(ies), or testing a specific hypothesis(es). Before they set out
to do any kind of data collection, they must have a set of research questions
and/or hypotheses.
[NOTE: Please refer to supporting materials (and potential handouts
for students): Considerations when Choosing
a Data Collection Strategy and Advantages
and Disadvantages of Data Collection Strategies.]
III. Data Analysis and Interpretation
Once students have collected their data, they will need to analyze and
interpret it critically and meaningfully. Please refer to the handout
called Basics of Data Summary: Definitions
and Using Excel.
Depending on your expectations, you will want to allocate a reasonable
portion of in class time to discuss:
- The importance of telling a story with data - what are the key themes?
- Strategies for summarizing data - which of the quantitative pieces
is it most important to tell your audience about?
- Using frequencies and percentages (number of actual responses
in a specific category)
- Using measures of central tendency (mean, median, mode)
- Using measures of dispersion (range, standard deviation)
- Good practices for visual representations of data (e.g., bar charts,
line graphs, pie charts, histograms, other tables, etc.)
- Strategies for including qualitative data - what kinds of qualitative
information do they have? Can they identify themes? You may also articulate
the value of using example quotations (or other evidence) to supplement
their quantitative information.
- Advantages and disadvantages of the method they chose. [Refer to Handout:
Advantages and Disadvantages of Data Collection Strategies.]
- What are the strengths of their work? The limitations of their
data?
- What conclusions can they draw with confidence?
- What unexpected results did they encounter?
- Are there possible alternative explanations for their findings?
- What suggestions or considerations do you have for future investigations?
NOTE: If faculty feel comfortable and want to cover such ideas in class,
more sophisticated analyses in Excel can be run, such as t-tests, correlations,
regression, ANOVA, etc.
IV. Final Project Summary
There are a number of options for a final project summary. If you have
had students working in groups, then you might choose to have students
deliver some kind of group presentation either in class or on-line. Alternatively,
you might have student groups post group papers on-line. There are various
technologies that might be used to facilitate this (e.g., PowerPoint,
a webpage, TownHall, etc.).
V. Reflective Component
For students
The final part of this assignment asks students to reflect on their learning
as a function of this assignment. This might be incorporated into their
final product in some way, it might be a separate reflective paper, or
it might be part of the final course portfolio. Whatever you choose, ask
students to consider:
- what was easy, hard, and/or unexpected about this assignment,
- how this assignment contributed to their development in the competencies
outlined as part of the assignment
- the extent to which they believe they met the assignment's learning
objectives
- what they would do differently if they had to complete this assignment
in the future.
For faculty
As you facilitate class discussions, answer questions, and grade student
work for this assignment, consider keeping your own list or journal of
learning lessons. Possible questions to consider include:
- What did you feel you might have done a better job articulating? How
might you change your presentation/discussion of the assignment or material?
- What student questions continually surfaced? That is, what issue(s)
did they seem to have an especially hard time grasping?
- As you consider their end product, what did students seem to do especially
well? With what were you dissatisfied?
- How much time did you allocate in class for this assignment? Was it
too much, not enough, or just about right?
- What unexpected learning took place in the context of this assignment,
either as you consider what your students produced and learned or as
you reflect on your own expectations?
- If you used this assignment in the future, how might you change it
to more effectively meet your needs and/or learning community learning
objectives?
VI. Suggested Elements of Final Project/Presentation
- Introduction to the project
- Research questions, hypotheses, and/or key constructs of interest
- Summary of key decisions in data collection (e.g., operationalizations
of key constructs, description of method(s) used, example data collection
forms, etc.)
- Group summary (analysis) of compiled quantitative and qualitative
information. This might include any tables, figures, graphs, or charts
that they created, as well as whatever records or evidence of their
raw data that they have kept.
- Summary of group knowledge (interpretation). This should include some
discussion of strengths, weaknesses, future directions, etc.
- Group and/or individual reflective piece
|
|
::Advantages and Disadvantages
of Data Collection Strategies
Structured Interviews
Advantages:
- Treats each participant as unique individual, builds on their reality
and experience.
- Fairly standardized format allows for comparison of responses across
individuals.
- Can ask questions in a number of formats, ensures that participants
understand the meaning of the question.
- Can take advantage of opportunities to learn that present themselves
that may have been unforeseen.
- Adaptability/ flexibility/ can expand on developing ideas, in comparison
to surveys, can clarify answers (probe), encourage respondent to elaborate,
get fuller answers to open-ended questions.
- Can control sequencing of questions (e.g., skip questions, etc.).
- Response rate can be potentially increased.
- Permits observation of non-verbal cues.
Disadvantages:
- Interviewer bias: attitude, tone, body language may affect the participant's
responses.
- Interviewing is time-consuming.
- Open-ended questions are not easily reduced to numbers.
- Responses may not be accurate, honest, or there may be memory recall
problems.
- It is difficult to compare across cases if not all the questions were
the same.
- Pre-existing biases may have affected the questions asked and interpretations
given.
- Depending on design, the data may not be easily reduced to numbers.
Observations
Advantages:
- Shows us how people behave in everyday life.
- Can interpret individuals' behavior in the context of their environment.
- Can do systematic counting along with qualitative observations.
Disadvantages:
- Cannot establish cause and effect, difficult to pinpoint the direct
cause of the behavior or the exact meaning of the counts.
- Observer presence may cause people to act differently than they would
normally behave.
- Observer bias: Individuals have a tendency to see what they want or
expect to see.
- Not likely to observe undesirable or infrequent behaviors.
- Observations are time-consuming, particularly if you deal with reliability
concerns through observer training.
- Depending on design, data may or may not be easily reduced to numbers.
Content Analysis
Advantages:
- Can do systematic counting along with qualitative observations.
- Typically inexpensive in terms of time and money.
- Allows for study of processes occurring over longs period of time.
- Method is unobtrusive, seldom having any effect on the subject being
studied.
Disadvantages:
- Cannot establish cause and effect, difficult to pinpoint the direct
cause of the behavior or the exact meaning of the counts.
- Reliant on recorded communications.
- Can be difficult to translate existing records (e.g., magazines, TV
shows, statistical records, etc.) into quantifiable indices of some
general concepts.
Surveys
Advantages:
- Less time intensive, can get a lot of information in a short amount
of time.
- Surveys are relatively inexpensive.
- There is a standardized format, can directly compare information across
individuals.
- Respondents may have greater confidence in anonymity and thus be likely
to respond more candidly.
Disadvantages:
- Responses may not be accurate, honest, or there may be memory recall
problems.
- Need to be careful about wording of questions, e.g., accessible to
targeted age group, educational background, class backgrounds, or ethnic
groups.
- Experimenter bias: in wording of questions or attitude and behavior
of the surveyor.
- Survey information generally does not penetrate very deeply below
the surface of an issue.
- Reliance on written/ reading comprehension.
|
|
In each data collection strategy, students are gathering information
for the purposes of exploring an area of interest, examining a particular
theory(ies), or testing a specific hypothesis(es). Before they set out
to do any kind of data collection, they must have a set of research questions
and/or hypotheses.
Interview data
A primary task here is for students to generate a set of interview questions.
Issues to explore with students include:
- The choice to use open-ended questions, close-ended questions, or
some combination of both.
- Guidelines for writing questions or items and length considerations.
- Demographic information. What groups might they want to compare across
and why? What do they need to know about their participants?
- Sampling, response rate, and generalizability. For example, whom do
you ask to fill out your questionnaire and why? What happens when only
a small number of individuals agree? How generalizable are your findings?
- Research ethics, including confidentiality and anonymity
- How will they design their interview form in order to increase the
reliability of their data collection efforts?
- Good practices for conducting interviews, emphasizing interviews as
a social interaction, e.g, obtaining consent, professionalism, importance
of eye contact and body language, listening and clarification skills,
appropriate dress, etc.
Observational data
A primary task here is for students to decide what behaviors to observe
and how they will specifically define (or operationalize) these behaviors.
Issues to explore with students include:
- Defining their constructs of interest in measurable, specific terms
in order to get some quantitative counts
- At the same time, it is important to remain open to novel events and
insights - what kinds of qualitative things do they feel are important
to record?
- Where will they do their observations and for how long? Are there
any strategic considerations here given their theories and interests?
- Research ethics, including confidentiality and anonymity.
- How will they design an observation coding or rating sheet in order
to increase the reliability of their data collection efforts?
Content analysis data
A primary task here is to determine what concepts are of interest to them
and how they will specifically define (or operationalize) these concepts.
Issues to explore with students include:
- What materials to use as their sample, e.g., women's magazines, television
advertisements, billboards, MTV videos, commercial websites, or other
specifically defined public spaces.
- The parameters for data collection. For example, how many magazines
will each person code? How many hours of television or how many music
videos will each person view? Does the rating of a television program
matter? Is the time of day an important issue to consider? Will individuals
attempt to code the same material or will they intentionally target
different material?
- What specific information or categories will they code within their
sample of materials?
- How will they design a coding or rating sheet in order to increase
the reliability of their data collection efforts?
- Research ethics, including confidentiality and anonymity
Survey data
A primary task here is for students to generate a set of survey questions.
Issues to explore with students include:
- The choice to use open-ended questions, close-ended questions, or
some combination of both.
- Guidelines for writing questions or items and length considerations.
- Demographic information. What groups might they want to compare across
and why? What do they need to know about their participants?
- Sampling, response rate, and generalizability. For example, whom do
you ask to fill out your questionnaire and why? What happens when only
a small number of individuals agree? How generalizable are your findings?
- Research ethics, including confidentiality and anonymity · How will
they design their survey instrument in order to increase the reliability
of their data collection efforts?
- Good practices for survey administration, e.g., obtaining consent,
professionalism, appropriate dress, etc.
- (If faculty feel comfortable) Creating scales and more detailed measurement
concerns.
|
|
Strategies for Summarizing Data
Frequencies and Percentages
Frequency:
The number of actual responses in a specific category; how often a response
occurs.
Percentage:
The number of actual responses in a specific category divided by the
total number of responses; percentages are essentially relative frequencies.
Measures of Central Tendency: look at the most typical score in
a data set
Mean:
The average score (sum of scores divided by the total number)
Median:
The middle score (organize scores from lowest to highest and find the
middle score)
Mode:
The score (or response category) that received the most responses (organize
scores in a frequency distribution and find the most common score)
Measures of Dispersion: degree of differences, or variability,
within a data set.
Range:
Defines the spread of the scores from lowest (minimum) to highest (maximum).
Standard Deviation:
Roughly the average distance of scores from the mean.
- The standard deviation (SD) also gives you information about percentiles.
Assuming a normal distribution (a bell curve), 68% of scores fall within
one SD of the mean. 95% of the scores fall within two SDs of the mean.
- For example then, if you have a score that is one SD above the mean,
then that score is at the 84th percentile, assuming a normal distribution.
Using Excel to Perform these Functions
1. Type in variable that you will be entering.
2. Enter your data in a column (for easiest visibility) underneath the
variable name.
3. You are now ready to summarize your data. Before performing a function,
click on the cell in which you want the result to go.
4. To perform a function, you can either go to the function key or go
to 'Insert' function.
5. Choose which function you want to perform. A screen will appear that
asks you to tell Excel which numbers should be used in the calculation.
6. To indicate which numbers Excel should use you have two choices. One
choice is that you can type in the cell letter and number, divided by
a colon. Alternatively, you can click on the icon with the small red square.
After doing so, highlight the numbers you wish to be used in the calculation.
Then, click on the icon with the red square again. The summary statistic
should appear in the cell you indicated.
7. Using the above steps, you can calculate the mean, median, mode, minimum
and maximum score (to get the range), and the standard deviation.
8. If you are interested in more advanced data analyses and they are
not available on your computer, you can usually "add-in" a specific feature
with the MS Office CD.
9. Randy Gabel has created a VERY HELPFUL website for first-year
students, with resources supplied by our very own Ginger Montecino. The
website, among other things, has in great detail how to create frequency
tables and instructions for using Excel. The address for this page is
http://classweb.gmu.edu/mgabel/unit1_2001/
|