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4

Try the IAPS--International Affective Picture System; they have disgusting images as well as norming procedures and data. You can read about it here and request it (as long as you have a faculty advisor) here.


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To calculate $d'$, you need to know two things: the hit rate and the false alarm rate. The hit rate is the proportion of trials where the stimulus was present and the subject responded that the stimulus was present. The false alarm rate is the proportion of trials where the stimulus was not present, and the subject responded that the stimulus was present. ...


3

Short answer The control subjects were abstinent for at least 60 and 90 days, respectively. Background The article you cite mentions the following in the Materials and Methods, and I quote: From the remaining subjects, age, gender, and AUDIT scores were used to create a matched control group reporting no marijuana use in the past 60 d. A similar ...


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The researchers used a questionnaire to identify daily users, that is, the experimental group contained persons who had used marijuana every day during the past 60 days. The control group, on the other hand, consisted of persons who had not used marijuana at all during the past 60 days. The researchers probably felt that 60 days (that is, three months or a ...


2

You are looking for Mbrola! It's an open-source, text-based diphone synthesizer. While it doesn't allow you to control subtle information like formant frequency, it's perfect for controlling pitch and duration. The one caveat is that I have yet to get it to work on an Intel-based Mac, but that is primarily because the Windows GUI works so well that I could ...


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Praat is free and has been cited in many publications. It's the de facto standard for creating phonetic stimuli.


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You may also have a look at the EmoMadrid-database, which can also be accessed for free and the author's do not mention any restrictions of whom they give it to. Here are the instructions on how to get access.


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Conceptualization in a research methods context basically means generating a precise definition. You and I might have different ideas of what it means to be feminine, which would make it difficult to measure. In order to conduct research that measures femininity, a precise definition is needed so that everyone has a common understanding of what exactly it is ...


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As far as my knowledge goes, I don't think these two types of reasoning in cogsci are any different to other forms of inductive or deductive reasoning: one is a bottom-up approach and the other a top-down process. Deductive reasoning starts at the general and moves towards the specific, going from theory to hypothesis, observation to a confirmation. This ...


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The index of sensitivity $d'$ is typically defined in terms of two equal variance normally distributed random variables with means $\mu_s$ and $\mu_n$ and standard deviation $\sigma$: $$d'=\frac{\mu_s-\mu_n}{\sigma}$$ In behavioural experiments, the probability that the subjects responded correctly (either saying 'yes' when the signal was present or saying ...



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