Acuity and Retinal Location Lab Part II
- Purpose and Goals
- to measure and see how acuity deteriorates as the stimulus is moved
farther from the fovea
- to develop some understanding of what is an experiment
- To begin to learn how to design an experiment to answer a question
- to compare data to hypothesis
- To expand our understanding of Acuity
- To develop skills in doing graphs and calculations in Excel
- Stimulus Settings:
- Stimulus Type: Choose either: Vernier, Motion Jump, Motion Smooth (just one)
- Contrast: Do not change, as last time
- Stimulus Positions: Use same as last time
- Background Level: Do not Change
- Experimental Method Settings:
- Number of Levels of Critical Feature Size: Same as last time
- Number of staircases: Same as last time
- Minimum Value of Critical Feature Size: 0.1
- Maximum Value of Critical Feature Size: 10 (Same as last time)
- Make the browser fill the screen.
- Place your head centered on the screen 24" from the monitor surface.
- Fixate on the red fixation mark. Do not move your eyes from that
- The stimulus will be presented at the position you chose for this condition.
- If you see it, press the yes button or the z key.
- If you do not see it, press the no button or the / key.
- The threshold is calculated at the end of the experiment.
- Press the Show Threshold button to display the threshold and then record your results.
- Remember how the threshold is calculated
Here is the link to the lab.
- Write-up: (Method, Results, Summary)
- Week 1:
- Nothing Due
- Week 2: Graphing Results with Error Bars
- Do a graph of your results to hand in on Moodle.
- Your graph should be and x-y scatter plot with points connected by straight line connectors
- Put error bars around mean values.
- Week 3: Abbreviated Lab Report with the following sections:
Method: Your method must include the following subsections:
- Participants: A brief description of who was in your experiment.
You need data from all members of your group
- Stimulus: A description of all stimuli used and your calibration
- Equipment: What equipment you used
- Procedure: How you collected the data
- Results: a description of your findings
- Use your data and the data from the other member(s) of your group.
- Summary: Do your results match your expectations, listed at the beginning
of this page