Table 5.

Features used by our weighted feature model. The last two columns indicate the direction of the feature that would indicate a stronger preference for X when attributes are positive or negative. The two features that include the phrase “max/min” were treated differently for positive and negative attributes. For positive attributes, these features refer to maximums; for negative attributes, these features refer to minimums.

Feature	Type	Positive attributes	Negative attributes
Number of chosen attributes	Integer	−	+
Number of forgone attributes	Integer	+	+
Number of forgone options	Integer	+	+
Number of forgone options containing X	Integer	−	−
Max/min number of attributes in a forgone option	Integer	+	−
X in every option?	Binary	−	−
Chose only option containing X?	Binary	+	+
X the only difference between options?	Binary	+	+
All options have same number of attributes?	Binary	+	+
Chose option with max/min number of attributes?	Binary	−	−