Due at 11:59pm, Friday, May 6th, 2016 by uploading submission to Stellar.
You must complete the self-assessment form before you hand in the assignment.

This problem set is for the graduate 6.831 class only.

This problem set is the final in a series (RS1, RS2, RS3) about reproducing a controlled experiment from a published paper. In this problem set, you will analyze your results and write them up.

Here are useful video tutorials picked by the course staff:

Plots in R:

• Bar Charts and Pie Charts
• Boxplots
• Summary Statistics
• Adding Text to Plots
• Adding Legends to Plots

AVOVA in R:

• One-way ANOVA
• One-way Repeated Measures ANOVA

AVOVA review:

• Calculating SST (total sum of squares)
• Calculating SSW and SSB (total sum of squares within and between)
• Hypothesis Test with F-Statistic

Experiment Analysis (50%)

Analyze your data. Was there a significant difference in performance among your conditions? To answer this question, you should first graph your data in an informative way, including error bars. Next, perform a test for statistical significance. Use the paper you're replicating to guide you in how to display and analyze your results. Note, however, that you did fewer conditions than the paper did, so the details of your test (the number of factors in the ANOVA, for example) may differ from theirs. Finally, discuss how the users' subjective feedback compares to the collected data and statistical analysis.

Report (50%)

Write up your results in a brief report, at most 3 pages long. Your report should have the following parts:

• Method
  • Apparatus: the physical equipment you used
  • Conditions: the independent variables
  • Measures: the dependent variables you measured
  • Procedure: a description of what participants did in your study
  • Participants: how you recruited your participants, their general demographics (age, gender, occupation), and any other factors important to your study (e.g. handedness). Do not include personally-identifying information about your participants.
• Results: graphs and statistical tests and discussion of your results

Follow the model of the paper that you're replicating; pay close attention to how it describes the study and how it presents its results. Be sure to clearly state where your replicated study differs from the original, both in experiment design and in outcomes. Also, if you had to drop any participants or discard some data, state that explicitly and provide reasons.

What to Hand In

You must complete the self-assessment form before you hand in the assignment.

Submit your report as a PDF file on Stellar and complete the self-assesssment form. Include a list of the people you discussed this assignment with, or explicitly say that you discussed the assignment with nobody. (you can put this at the top of your report). This is an individual assignment, so be aware of the course's collaboration policy.