For the purpose of our discussions, we will define "serious impact" as something that has negative consequences to health and safety of the self or others rather than something that is inconvenient or embarrassing. 

You should start each "initial forum post" with, "For my perceptual phenomenon this week I chose _____________(fill in this blank with the name of the phenomenon)”, then  give a brief description of how the phenomenon works (don't dwell too much on this part - we can all read the details in the textbook or in an article - and instead just provide enough information so we all as readers of your post understand what happens when the phenomenon occurs) and describe both your everyday example of the occurrence of the phenomenon and how it could have serious consequences. The phenomenon can be one occurring in persons not suffering a particular condition (like the example below--pretty much everybody experiences what happens to our ability to differentiate colors and their brightness around dusk and that is not abnormal at all) or it can be the result of a disorder or injury. And of course, the phenomenon won't always be about vision. 

Reminders: 

You will need to be specific, thorough and concrete. Just tacking onto the end of a post a statement or two that something could be a problem is not sufficient. Additionally, saying you don't know of any negative consequences will not be sufficient to earn points. You will need to explain how the phenomenon specifically has a negative impact. 

While it is expected that more than one person might pick the same phenomenon because the human experience is filled with many of them but the number is not infinite, you should make a good effort to no repeat ideas classmates have already brought to the discussion.  If you repeatedly only select what others have already discussed, or if your post essentially replicates the work of another student has already posted, points cannot be assigned for your post.