Rejection quotient

Divide the difference obtained in (ii) above by the range from (/) to arrive at the rejection Quotient Q,... 

There are two criteria which are commonly used to gauge the rejection of results. Of these, the most convenient to use is based on the jf 2believe this limit is too wide, and regard the Q-test at a 90% confidence level to be a more acceptable alternative. A rejection quotient Q is defined as... 

Table B.l Critical values for the rejection quotient, Q ruicai...

This equation can also be used as a quality control measure for the analytical procedure in atmospheric water if the deviation of the quotient Z[anions]/Z[cations] is > 20% from unit (1), the analysis must be repeated or the samples should be rejected. 

Two-choice tests involve the presentation of two stimuli, either a treated and an untreated sample, or less commonly, two treated samples. Again, after a period of time, consumption (and/or spillage) is measured. When a series of treated samples are being compared in two-choice tests, completely counterbalanced or Latin-square designs are used. Counterbalancing is important because experience with successive stimuli influences the results. Preference relationships among stimuli in pairwise comparisons may be intransitive, i.e., stimulus a may be preferred to stimulus b, and stimulus b may be preferred to stimulus c, but it is not necessarily true that stimulus a is preferred to stimulus c. The results of two-choice tests often are expressed as preference ratios or difference scores. With the former, consumption of one food is divided by total consumption of both foods in a test session. A preference ratio of 0.5 represents indifference for the food in the numerator of the equation, while quotients of 1.0 and 0.0 represent absolute preference and complete rejection, respectively (Mason et al. 1989). With difference scores, mean consumption of one food is subtracted from mean consumption of the other. A score of 0 indicates indifference between foods, while scores larger than 0 reflect preference for the food in the numerator... 

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