Class: 731 (Plunger), Feature: 1699

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 main focus is the plunger or objects, and in these images the main focus is right on the plunger, which is useful and relevant.
Main Object	4	The red region in the highlighted visual attributes focuses on the part of the plunger.
Main Object	3	Focus is on the handle of the plunger.
Main Object	5	The heat focus is highlighted on the image objects on the sides and central parts of the spatulas and blades.
Main Object	4	The overlap mainly focuses on the base of the predicte object but it also spreads slightly to the background.


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