SP survey methodologies involve the definition of the choice alternatives, of the attributes (or factors) considered for each alternative, of the levels of variation of each attribute, of the choice contexts (scenarios) proposed to the decision-makers, of the type of preference asked, of the modality of interview management [27, 29].
This type of patient preference can have implications for open-label trials where patients are aware of their treatment allocation.
Consequently, the bundle (x_{f}) would have to be neutral with respect to the type of preferences (R^{m}_{f}), that is, it would have to be distorted neither to the right nor to the left.
In consequence, in order to characterise the largest (rho )-equivalent loss we must focus on those individuals who choose their bundle with the type of preferences that show the lowest concern for health.
Anand and Hacquard (2013) call this type of attitude verbs "preference-oriented attitudes".
While initially the participants reported no strong preference for the way in which their therapy was delivered (conventional therapy or computer based), after experience using the Nintendo Wii Fit, they reported an aversion to this type of therapy and a preference for conventional therapy approaches often citing they felt conventional therapy to be more effective.
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Anand and Hacquard argue that the semantics of this type of attitude also contains a preference component, in addition to the representational component.
However, this type of approach does not measure preference between two samples, since each type of food/odor is tested separately and the animal is not offered any food choice [12].
