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bio website jeromyanglim.blogspot.com
location Melbourne, Australia
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visits member for 2 years, 7 months
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I am a Lecturer in the School of Psychology at Deakin University bridging I/O psychology and statistics.

I'm quite active on the Cognitive Sciences and Statistics Stack Exchanges.

You can find me also on:


Mar
25
comment Why does speaking disrupt rhythm?
An additional observation: In order to sing and play an instrument at the same time I needed to ensure that I both understood the rhythm of the melody and the rhythm of the music and that I was able to align the two to a common beat.
Mar
24
comment What is the standard error of measurement for teacher made multiple choice tests?
With regards to absolute performance: I agree that making claims about absolute performance from a test in a rigorous way is very difficult. But ultimately any teacher who is asked to decide what is the passing grade is forced to draw an absolute line in the sand somewhere. This might be a particular value of theta or a proportion correct on a test. My guess is that many teachers feel more comfortable talking about proportion correct (e.g., less than 50%, 60%, or whatever is the custom is a fail).
Mar
24
comment What is the standard error of measurement for teacher made multiple choice tests?
With regards to heuristics: Any heuristic would be based on the assumption that the teacher would be writing a set of additional items of roughly comparable quality, difficulty, and variety as the existing items. I acknowledge that some teachers might differ in their skill in doing this, but at the same time, a heuristic could be frame in terms of a ball park or a typical range.
Mar
19
comment Why do humans like being touched?
You might want to read this review of social touch research: Thayer, S. (1986). History and strategies of research on social touch. Journal of Nonverbal Behavior, 10(1), 12-28.
Mar
18
comment What is the standard error of measurement for teacher made multiple choice tests?
In addition to difficulties in implementation, I think IRT is not applied in teacher constructed test settings because there is often an implicit contract with the students. That is, a student's mark is directly related to the proportion of items answered correctly. Thus, in IRT there is still the question of how thetas will be mapped on to exam grades. Of course this can be overcome, but I think it presents another obstacle to uptake, particularly where the test is used to make judgements about absolute performance and not just normative performance.
Mar
17
comment What is the standard error of measurement for teacher made multiple choice tests?
+1 I agree IRT (bayesian IRT in particular) provides a great framework for modelling multiple choice tests. In my particular case, I'm looking for heuristics that teachers might use to guide their decision about how many items to include in a test. I'd like to be able to give teachers a rough sense of how much more accurate their test could be if they for example increased their test from 80 to 100 items.
Mar
10
comment What is the standard error of measurement for teacher made multiple choice tests?
Standard error of measurement is the standard deviation that would be obtained if you were able to repeatedly obtain a measure for a particular individual under hypothetical identical circumstances. I.e., it's a measure of the uncertainty you have about a measure you have obtained on a person.
Mar
6
comment Is fear rational?
As a related topic you may want to read up about the evolution of emotions and arguments for their adaptive functions: en.wikipedia.org/wiki/Evolution_of_emotion
Mar
5
comment Should fantasy distractors be avoided in multiple choice questions
Can you clarify how you are defining "fantasy distractors"? Obviously without incorrect options, it would not be a test. But from your single example, I can't discern the exact distinction you are making between different types of distractors.
Feb
28
comment What are the effects of social rejection on the brain?
Could you add a reference to the study?
Feb
27
comment What is it called when a student tends to speak about what he knows?
It sounds a bit like framing/reframing. Politicians and job applicants do it all the time.
Feb
15
comment Why are most people right handed?
an interesting discussion of this topic: io9.com/5840005/why-are-most-people-right+handed
Feb
13
comment What is the mechanism behind “gut feelings”?
That sounds interesting. Any thoughts about how your theory of gut instinct might be applied to the OP's context of answering questions on an IQ test?
Feb
13
comment Are there cognitive benefits to two hand typing versus one finger?
@StevenJeuris . good point. I've divided the content into two clearer sections now.
Feb
11
comment What are the most well-understood vocal animal languages?
I imagine quantifying "well-understood" would be difficult. Does this list of well-studied non-primate animal languages meet your needs en.wikipedia.org/wiki/…
Feb
8
comment How to adjust SSE or RMSE for the number of free parameters in the model?
This sounds more like a question better suited for stats.stackexchange.com . Is there an aspect of this that relates particularly to cognitive modelling?
Jan
28
comment How people choose at random
It would also be interesting to know whether people could be trained to choose more "randomly".
Jan
28
comment Does the Hodgkin-Huxley Model take into account the action of the ion pumps (e.g., Na-K-ATPase)?
Welcome to the site. Please don't simultaneously cross-post on multiple stack exchange sites. biology.stackexchange.com/questions/6944/…
Jan
18
comment Is the Raspberry Pi capable of operating as a stimulus presentation system for experiments?
Interesting idea. What kinds of experiments were you planning on running with it? I wonder whether you'll get a better answer here or on raspberrypi.stackexchange.com
Jan
16
comment Quantify degree to which non-diagnostic features bias category-present response
(b) Given that participants do not know the true probabilities apriori nor whether they are stable over time, how does Bayesian updating of probability estimates or probability matching relate to your conception of the correct response over time?