Simple True/False Question Paper Bias Analysis

We have 34 question papers, approx 100-300 questions each. All are True or False answers, answers are provided on the paper itself. Format is text file. Question sample: Q("The liver is dull to percussion ",T); Full sample file also attached. Please view to see sample of question paper. Ignore all markup formatting, only lines beginning Q are important, T/F answer is at end of line What we need from service provider is analysis of the papers to find bias and keywords: 1. For each paper, find out percentage of True & False answers. 2. Certain common key *trigger* words appear in many questions, such as 'normally','only','should','sometimes' etc...We need to know if certain words appear in a question, is there a bias to the result (e.g we have done preliminary work and found for example "80% of questions which have word 'only' in it have answer 'F'" What we want to find is all words which cause 60% or more bias in True or False direction. We expect 10-15 such words at least, maybe more or less. Service Provider can use Manual or Software analysis as long as we get the results we need. Simple project, no fuss or changes anticipated. Low budget - $30-$60. Turnaround time - 7to10 days.