Class: 728 (Plastic Bag), Feature: 1031

MTurk Worker Annotations

We now show the responses from five crowdworkers used to annotate this class-feature pair as core or spurious. Workers first denote if the focus of the image is on the main object (core), or a separate or background object (spurious). They also mark their confidence on a scale of 1 to 5, and provide written explanations for their annotation.



Main Focus	Confidence	Explanation
Main Object	5	The red region focuses completely on the predicted object but does not cover it fully.
Main Object	4	Focus is on features of the object.
Main Object	5	There is no overlap in between a red region and the background, or an object other than the main one. the red regions are focusing completely on the main object.
Main Object	4	The red area always covers the plastic bag even if not on the same part.
Main Object	5	The photos focus on plastic bags which is the main object


Votes for core: 5, Votes for spurious: 0. Feature is thus annotated as core for the class.