This learning object is part of a much larger website, GoCognitive, which offers open educational resources for “students, educators, and researchers in cognitive psychology and cognitive neuroscience.” The specific module on Change Blindness is a demonstration via which participants look for changes between two presented images. The changes can include deleted elements, color and location changes, size changes, and so on. Participants control the flicker rate of the presented images. Overall, the site offers a fun, interactive way to understand change blindness by putting the controls in the user’s hands.
Type of Material:
• This is a very useful demonstration to assist in understanding change blindness. The ability to control the masking interval and speed (flicker rate) helps one see the importance of these variables.
• This demonstration would be useful in either individual browsing for students (such as through posting online for students to review) or for a class demonstration of each image, allowing the class group as a whole to take note of the changes.
A basic web browser is needed. Two peer reviewers reported a superior experience using Google Chrome 39.0 (vs.Mozilla Firefox). The demonstration also requires Flash.
Identify Major Learning Goals:
• Students will learn about change blindness across multiple images of varying complexities.
Target Student Population:
• High school and college students studying Sensation and Perception within Introduction to Psychology or a more advanced course would benefit from this demonstration.
Prerequisite Knowledge or Skills:
• Basic computer navigation skills are needed to successfully surf the demonstration.
• Some background in Sensation and Perception in Psychology would be beneficial.
• The strength of this learning object is that it is a hands-on illustration of the change-blindness paradigm. The module keeps track of the total time to identify the changes, the number of incorrect clicks, and other variables.
• The seven (7) demonstrations provide varied opportunities to understand change blindness. Some of the images are simple, some complex. Because the timing is under the user’s control, the demonstration allow for a heightened learning experience that leads to a deeper understanding of change blindness.
• The demonstration does not include background information, academic references, or web resources on change blindness. This content will need to be supplied by instructors.
Potential Effectiveness as a Teaching Tool
• This material can be very useful for teaching and studying change blindness, change detection, visual attention, and visual perception.
• The demonstration can be implemented in the classroom setting and in individual research.
• It is a very short demonstration overall and offers a clear and concise illustration of change blindness.
• Because users control timing and masking, they can test themselves multiple times under different conditions. The user controls when each of seven (7) images begins; on identifying the change, the user clicks the area. The program will stop and state when the user finds the correct area. The user can affect the changes across five (5) levels of mask time and four (4) different speeds.
• Additionally, the site allows users to retain data for comparison purposes.
• The demonstration is not currently designed as a stand-alone teaching module. Instructors will need to provide additional information to aid students in understanding what they are viewing. For example, the site has wonderful imaging for those who already have an understanding of how change blindness works and the effect of timing. A little more information will be needed for those who do not have this background.
Ease of Use for Both Students and Faculty
• The site is generally very easy to use. Instructions are on the first page. Once on the next screen, the images are located across the bottom with controls across the top of the screen.
• Nonetheless, the navigation on entering the demo can appear somewhat unclear. Additional instructions would be useful (possibly including solutions for viewers who are ultimately unable to locate the changes between images).
Other Issues and Comments:
Go Cognitive: Change Blindness is an excellent teaching and learning material. Visitors may wish to surf additional components from the Go Cognitive website.
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