A psychologist plans the first study comparing adults' proofreading when a passage is presented on paper and on a computer screen. No previous research has compared these two conditions.
Before collecting any data, the psychologist writes this pair of hypotheses:
Alternative hypothesis: 'Adults will identify more of the 20 spelling errors in a 600-word passage presented on paper for five minutes than in a matched 600-word passage displayed on a computer screen for five minutes.'
Null hypothesis: 'Adults will identify more of the 20 spelling errors in a 600-word passage displayed on a computer screen for five minutes than in a matched 600-word passage presented on paper for five minutes.'
Explain two problems with this pair of hypotheses.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.