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Dimension

Pros

Cons

Learnability

> There are several dimensions that the user can search based on, so the user can learn quickly what sorts of keywords to input.
> There are most recent/popular photos on the first page. Users who don't know where to start can start by clicking on those photos.
> The comment layout is similar to that of several popular websites, including Facebook.

> Since there are a few search boxes, the user may not know at first what types of keywords to use to get good results according to what he/she wants. 

Visibility

> Uploading photos and entering comments gives feedback right away. 
> The name of the user who is currently logged in is always shown on the top bar

> The view page does not show the pictures in the same series (uploaded in the same date by the same person) as the current picture. 
> The Manage Photo tab does not show all the pictures that the user uploaded. So the user may have trouble finding the correct picture to edit information. 

Efficiency

> There is only one search box for all types of search terms. The user does not need to categorize his search term first. 
> The search boxes and some of the useful pages are always available on the left bar
> On the "View photo" page, the user can click on the "Prev" and "Next" links to access photos in the same series.  

> The user needs to upload one photo at a time and click "Add Photo" to add the next one. There is no way to upload photos in batches.
> The user needs to think about what category he/she wants to search for first, before choosing the right box to search.

Error Prevention

> Photo information can be corrected using the Edit Photo page 

> Some people may supply incorrect photo information, which leads to contaminated search results. Since only the uploader can change the photo information, that error may persist for a long time. 

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