Cognitive abilities in kindergartners and first graders: A comparison, evaluation, and extension of models using data from Robinson et al. (1996)

Paper submitted for final in structural equation modeling class, Spring 2009, UIUC Psychology. This paper is a critique of Robinson et al.'s (1996) paper on "The structure of abilities in math-precocious young children: Gender similarities and differences", published in the Journal of Educational Psychology (Vol. 88, Iss. 2, p341-352). This current paper, though, focuses on the age differences in abilities of kindergartners and first graders.

It is known that very young children show less differentiated cognitive abilities. Children who perform well in tests such as those involving math, tend to have correlated performance in other tests such as in verbal tests. As children age and progress towards adolescence, however, their cognitive abilities becomes differentiated so that abilities such as math and verbal abilities are not necessarily equally developed in the child.

Presumably, this occurs because when children are very young, they are untrained and unaffected by external factors such as education and related experiences (e.g. streaming into majors). Thus, the best predictor of the child's performance is the individual difference or a general factor. With age, the child undergoes specialization where children start to develop more specific knowledge in selective domains. Some children become more trained at math, while others at language. Importantly, these abilities aren't always equally developed. This may be the underlying reason for differentiated abilities in older children.

This current paper is a methodological exploration of the data in Robinson et al. (1996) using various modifications of the basic structural equation model. The main results are consistent with differentiated abilities in first graders relative to kindergartners. Some discrepancies in Robinson et al.'s (1996) paper are noted as well.

[Download pdf of paper]

VSS Conference Day 4: Demo Night Exhibit

VSS Conference Day 4: Demo Night Dinner

VSS Conference Day 4: Beach Day

VSS Conference Day 4: My Poster

This poster was presented at VSS Conference 2009 [link to VSS website], morning session [download poster pdf]. This study investigated the effect of task instructions on repetition suppression in the brain. Repetition suppression refers to the phenomenon that the brain response to repeated stimuli is usually reduced or attenuated. It is thought that such reduction in brain response reflects less neuronal recruitment, and hence, a more "efficient" way of processing the same information.
In this study, however, I postulated that under certain circumstances, the brain requires more neuronal recruitment in order to effectively process information for task demands. That is, repetition suppression becomes inefficient because it reduces the degrees of freedom that the brain can use to manipulate existing representations.

The study evaluated brain response in the fusiform region to face-pairs morphed at different levels of similarity. The idea is that the more similar face-pairs are, the more repetition suppression should be observed in the fusiform face area. Participants viewed the face-pairs under two different task instructions. The first task made face-pair similarity irrelevant. In this task, repetition suppression was observed to repeated faces. In the second task, face-pairs were made critical as participants had to make same-different judgments about the pairs. In this task, repetition suppression was eliminated.

The idea here is that in the same-different judgment task, the brain has to represent faces as distinctinctively as possible so that subtle morph differences can be detected. Thus, repetition suppression is prevented, possibly from executive function areas that process task instruction and exert a top-down modulatory control in the fusiform area.

The study also shows that there are individual differences in participants ability to exert this top-down modulation to regulate repetition suppression in the fusiform regions. This study was also performed in older adults, which will be reported in a subsequent research article. Briefly though, it is thought that older adults show declines in behavioral performance because of less distinctiveness in cognitive representations. This design is thus useful as a means to measure and related distinctinveness of representations in the brain and how that affects behavior.

VSS Conference Day 3: Illusion Night

Start of Illusion Night! This is an annual event where conference attendees submit their visual illusions for competition to see who's is the best. The top 10 are selected and show their exhibit here at Illusion Night. You can check out the illusions online [link]. The one that really wowed me was the curveball illusion, its the most dramatic one!

VSS Conference Day 3: Club car to beach

VSS Conference Day 3: Walking to the conference hotel

VSS Conference Day 2: Naples Grande

Touring the hotel lobby grounds.

VSS Conference Day 2: Poster session

Check out the poster session.

VSS Conference Day 1: Arriving at Fort Myers Airport

Just arrived at Fort Myer's airport, Florida. It is 80F and humid. Nice. The airport is about 30 min away from Naples. The shuttle will bring us there. More as we go along in the conference.

Default Network, Meditation, and Focus Training

A recent study found that teaching children to focus improves their health outcome [ScienceDaily report]. In relation to the default network in the brain, perhaps one of the things that such early training does is to improve the individual's ability to regulate default network activity. DN activity has been linked to self-reflection, self-monitoring, day-dreaming, task-unrelated thoughts etc., and has often been seen to be negatively correlated to one's ability to perform a task. That is, the more you are able to disengage your default network, the better you can perform the task. This is presumably because your attention is more focused and not distracted by task-unrelated thoughts.

It is then not hard to see the link between DN activity regulation and meditation. Meditation is an act of self-regulation of thoughts, and has been related to several positive outcomes, in terms of physical and mental health and ability. If we apply to adolescence and aging, perhaps one form of training that would be extremely deterministic of cognitive efficacy in older adults is the amount of focus training experienced.

Likewise, if we were to train indivduals on how to focus their mental thoughts, and improve them over time, might brain activity be modulated? And subsequently, might cognitive abilities be improved or preserved better with age?

A structural model of aging, brain and behavior

Possible working structural model that can be tested with measures of stimulus, behavior, neuro-functional, neuro-anatomical variables. The dynamic influences of age and "culture" can also be tested. Culture here refers to long-term experiences of any kind. More complex models can be postulated from this current framework by adding more factors, or measures, and by also constraining the specific weights and covariances. In the broadest sense, the weights and covariances are modeled linearly. However, certainly, non-linear functions can be imposed. The result of such impositions would be a neural network with non-linear activation functions.

Saltimbocca Chicken

Found this recipe while we were watching America's Test Kitchen. So you can look it up there also. I've modified it a little here. This is good. Saltimbocca means "jumps in your mouth" and this really does! Strictly speaking, the chicken is the saltimbocca, the pasta is from another recipe. I'll start with the pasta, because its relatively simpler.

Simple Creamy Pasta
Ingredients
Pasta (spaghetti, or any other type, string noodles are probably best)
Mascapone cheese
Two eggs
Salt & pepper
Any kind of suitable additional ingredients (we used mushrooms and asparagus here)

Instructions
Cook spaghetti in salted boiling water. Prepare sauce in the meantime. Use two egg yolks in a bowl, add two and half large "scoops" of mascapone cheese, stir until a smooth sauce, add salt and pepper to taste. Once spaghetti is done, mix into sauce, add chopped mushrooms and fresh asparagus, mix again, and done!

Saltimbocca Chicken
Ingredients
4 chicken breasts (thin fillet)
4 proscuitto (or ham) same size as chicken, or cut to same size
1 lemon
Parsley
Sage leaves
1/2 cup flour
Salt & pepper
1 1/2 cup white wine
4 table spoon butter.

Instructions
Preheat oven to 200F (this is for keeping the cooked chicken warm later when preparing the sauce). Make sure chicken and ham are dry. Add some pepper into flour. Coat the chicken with light layer of the flour. Sprinkle some chopped sage onto chicken. Place ham on chicken. Heat 2 tablespoon olive oil in pan. Fry some large sage leaves, few seconds each side, then set aside on oil draining paper for later garnishing. Place chicken in oil, ham side down. Leave for 4-5min. Turn chicken, cook for another 3-4min. Remove chicken and place in oven. Drain oil from pan, but leave the bits from cooking the chicken. Pour the white wine into hot pan and scrape the bits into the wine, let the wine reduce to 1/3 cup. Add half lemon juice, chopped parsley, and butter, stir mixture into a nice sauce. Take chicken out of oven, place on plate, put fried sage leaves on top, and pour sauce over and serve. Done!

Admiring a Predecessor's Work

In the course of writing my dissertation, I come across John Horn's work on Fluid & Crystallized Intelligence over the lifespan back in 1965. This is his thesis that he did while here at University of Illinois, and the copy is in our library. I borrowed it because in his work, he talks about how the factorial structure of psychometric intelligence changes with age.

The first thing I noticed about this work was that it was typewritten! Of course, it is not surprising, since back then, computers were not as available. Its not that. It was because I imagined the painstaking hours it took to generate this written document. What happens when you make a mistake on one single letter halfway? What happens if a fire burns the paper? Did someone digitize? I certainly hope so! How did he do all those calculations? It is extremely humbling to know that others have done this without the huge aid of modern technology and still produced such a marvelous product.

The next thing was that this thesis was signed by Cattell, well-known for formalizing this dual-factor theory of intelligence. Imagine, he touched this piece of paper. This is not sentimentality. This is reverence. I can only hope that my own work will one day be deemed useful to someone, even if only slightly. This is a perennial concern, beyond my control...but it is a strong hope. So much work has been done in the past, of which we mostly overlook or disrespect in our own ego to validate our own thoughts. We must recognize that "there is nothing new under the sun". But what has been given us is the joy of refreshing the old, and progressing into it in greater depths.

The final thing regards what Horn studied. Basically, he found that young adults perform better at tests of fluid intelligence than older adults, and older adults perform better than young adults on tests of crystallized intelligence. This is quite a well-known notion, of which I hear very little about these days. Perhaps it is my own ignorance? I am not sure, but reviewing this work sparks some need in me to investigate this further. Hence the impetus to pursue adolescent research to "fill" up the gap in lifespan studies in cognitive aging, which has focused on older adults. Perhaps much has already been done, I just haven't been in contact with this field or literature...time will tell. I will have to read up more. The graph in this photo is from his thesis. It is hand drawn, and it truly speaks a thousand words.

Studying Adolescents

The more I research into aging, the more I think that one important aspect of lifespan research is the adolescent period. This is an "impressionable" age, and there may be a good reason for that. Longitudinal neuroimaging data is needed to evaluate the impact of life experiences on determining subsequent aging outcome. Possible future pursuit?

My View on the Singapore River...Apparently!

Ha ha, forgot that I did this for Elaine long long time ago. Wow! Check out my interview.

http://www.fas.nus.edu.sg/geog/SingaporeRiver/vidz2.htm

15th July 2009
CURRICULUM VITAE
JOSHUA GOH OON SOO
Beckman Institute 405 N. Mathews Ave Urbana, IL 61801 USA	1 217 244 5579 (office) 1 217 778 9394 (mobile)
	jogoh2@illinois.edu
Lab Webpage: http://agingmind.utdallas.edu/
EDUCATION
National University of Singapore (1998-2001), majored in Psychology and English Language, minored in Philosophy, Bachelor of Social Sciences 2001. National University of Singapore (2002), Bachelor of Social Science with Honors (2nd Upper) in Psychology. University of Texas at Austin (Fall 1999), exchange program, majored in Psychology and Linguistics. Talent Development Program (1998-2002), National University of Singapore. University of Illinois at Urbana-Champaign (Fall 2005-Summer 2009), Doctor of Philosophy in Psychology.
MILITARY SERVICE
National Service (1996 – 1998)
EMPLOYMENT
Part-time research assistant at NUS Department of Geography (2000) Part-time autistic therapy assistant at NUS Department of Psychology (1999) Part-time research coordinator at Singapore General Hospital, Cognitive Neuroscience Laboratory (2001) Research coordinator at Singapore General Hospital, Cognitive Neuroscience Laboratory (2001-2005)
APPOINTMENTS
Editor, Talent Development Program magazine (2000-2001) Contact Group Leader, Varsity Christian Fellowship (1999-2001)
HONORS AND AWARDS
Incomplete List of Teachers Listed as Excellent by their Students, University of Illinois, Urbana-Champaign, IL, Fall 2008. Department Travel Grant, Psychology, University of Illinois, Urbana-Champaign, IL, Fall 2008. Summer Institute in Cognitive Neuroscience, Travel Award, Dartmouth (2005).
MEMBERSHIP IN SOCIETIES
Varsity Christian Fellowship (1998-2002), National University of Singapore Photographic Society (1998-2002), National University of Singapore Summer Institute in Cognitive Neuroscience, Dartmouth (2005) Singapore Psychological Society (2005-2008)
PUBLICATIONS
Jenkins, L. J., Yang, Y. J., Goh, J., Hong, Y. Y., Park, D. C. (2009). Cultural differences in the lateral occipital complex while viewing incongruent scenes. Social, Cognitive, Affective, Behavioral Neuroscience, in press. Goh, J. O., Park, D. C. (2009). Culture sculpts the perceptual brain. Progress in Brain Research, 178, 95-111. Goh, J., Park, D. C. (2009). Neuroplasticity and cognitive aging: The scaffolding theory of aging and cognition. Restorative Neurology and Neuroscience, 27, 1-13. Park, D., Goh, J., (2009). Successful aging. In J. Cacioppo & G. Bernston (Eds.), Handbook of Cognitive Neuroscience for the Behavioral Sciences. Hoboken, NJ: John Wiley & Sons. Sutton, B., Goh, J., Hebrank, A., Welsh, R. C., Chee, M. W. L., Park, D., (2008). Investigation and validation of intersite fMRI studies using the same imaging hardware. Journal of Magnetic Resonance Imaging, 28(1), 21-28. Gutchess, A., Hebrank, A., Sutton, B., Leshikar, E., Chee, M. W. L., Tan, J. C., Goh, J., Park, D., (2007). Contextual Interference in Recognition Memory with Age. NeuroImage, 35(3), 1338-1347. Goh, J., Chee, M. W. L., Tan, J. C., Venkatraman, V., Hebrank, A., Leshikar, E., Jenkins, L., Sutton. B., Gutchess, A., Park, D., (2007). Age and Culture Modulate Object Processing and Object-Scene Binding in the Ventral Visual Area. Cognitive, Affective and Behavioral Neuroscience, 7(1), 44-52. Chee, M. W. L., Goh, J., Venkatraman, V., Tan, J. C., Gutchess, A., Sutton, B., Hebrank, A., Leshikar, E., Park, D., (2006). Age-Related Changes in Object Processing and Contextual Binding Revealed using fMR Adaptation. Journal of Cognitive Neuroscience, 18(4), 495-507. Goh, J., Soon, C. S., Park, D., Gutchess, A., Hebrank, A., Chee, M. W. L., (2004). Cortical Areas Involved in Object, Background and Object-Background Processing Revealed with fMR-A. Journal of Neuroscience, 24(45), 10223-10228. Chee, M. W. L., Goh, J., Lim, Y., Graham, S., Lee, K., (2004). Recognition Memory For Studied Words Is Determined by Cortical Activation Differences at Encoding But Not During Retrieval. NeuroImage, 22, 1456-1465. Chee, M. W. L., Westphal, C., Goh, J., Graham, S., Song, A. W., (2003). Word frequency and subsequent memory effects studied using event-related fMRI. NeuroImage, 20(2), 1042-1051  Chee, M. W. L., Hon, N. H. H., Caplan, D., Lee, H. L.,Goh, J., (2002). Frequency of Concrete Words Modulates Prefrontal Activation during Semantic Judgments.  NeuroImage, 16(1), 259-268.
ABSTRACTS
Goh, J., Suzuki, A., Park, D. (2009). Attending to face-pair similarity decreases face adaptation in the fusiform area. [43.445]. Presented at the Vision Science Society Annual Meeting, Naples, FL, USA. Goh, J., Suzuki, A., Park, D., (2008). Aging reduces neural selectivity and increases face adaptation. [G94]. Presented at the Cognitive Neuroscience Society Annual Meeting, San Francisco, CA, USA. Jenkins, L., Yang, Y.,  Goh, J., Hong, Y., Park, D., (2008). Cultural differences in the processing of incongruous scenes revealed using fMR adaptation. [B21]. Presented at the Cognitive Neuroscience Society Annual Meeting, San Francisco, CA, USA. Suzuki, A., Goh, J., Sutton, B., Hebank, A., Jenkins, L., Flicker, B., Park, D., (2008). Emotional faces produced less repetition suppression than neutral faces. [E19]. Presented at the Cognitive Neuroscience Society Annual Meeting, San Francisco, CA, USA. Goh. J., Leshikar, E., Hebrank, A., Flicker, B., Sutton, B., Wang, W., Jenkins, L., Tan, J., Chen, K., Chee, M., Park, D., (2008). Age and culture modulate neural selectivity in the ventral visual area during face and place viewing. [Slide 218]. Presented at the Society for Neuroscience Annual Meeting, Washington, D. C., USA. Leshiker, E. D., Hebrank, A. C., Jenkins, L. J., Goh, J. O., Chee, M. W. L., Park, D., (2008). Episodic memory success is tied to parametric modulation of the default network in younger but not older adults. [Slide 815]. Presented at the Society for Neuroscience Annual Meeting, Washington, D. C., USA. Goh, J., Chee, M. W. L., Tan, J. C., Park, D., (2007). Aging and cultural differences in eye-movements during complex picture viewing. [D7]. Presented at the Cognitive Neuroscience Society Annual Meeting, New York, NY, USA. Goh, J., Chee, M. W. L., Tan, J. C., Venkatraman, V., Leshikar, E., Hebrank, A., Jenkins, L., Sutton, B., Park, D., (2006). Aging and culture modulate fMR-Adaptation in the ventral visual area. Abstract No. 359. Presented at the Cognitive Neuroscience Society Annual Meeting, San Francisco, CA, USA. Available online at http://www.cogneurosociety.org/content/CNS2006_Abstracts.xls Gutchess, A., Hebrank, A., Sutton, B., Leshikar, E., Chee, M. W. L., Tan, J. C., Goh, J.,  Park, D., (2005). Prefrontal compensation with age for contextual interference. Program No. 127.8. 2005 Abstract Viewer/Itinerary Planner. Washington, DC: Society for Neuroscience. Online. Chee, M. W. L, Goh, J., Tan, J. C., Gutchess, A., Sutton, B., Hebrank, A., Leshikar, E., Park, D., (2005). FMR adaptation shows that age and culture modulate visual processing of complex pictures. Program No. 127.4. 2005 Abstract Viewer/Itinerary Planner. Washington, DC: Society for Neuroscience. Online. Chee, M. W. L., Goh, J., Lim, Y., Graham, S., (2003). Event-related fMRI of incidental encoding of episodic retrieval of high and low frequency words. [17649]. Presented at the 9th International Conference on Functional Mapping of the Human Brain, June 18-22, New York, NY, USA. Available on CD-Rom in NeuroImage, Vol. 19, No. 2 Chee, M. W. L., Goh, J., Lim, Y., Graham, S., (2003). Neural correlates of the effect of word frequency at encoding and retrieval. Program No. 288.15. 2003 Abstract Viewer/Itinerary Planner. Washington, DC: Society for Neuroscience. Online. Chee, M. W. L., Soon, C. S., Westphal, C., Lee, H., Goh, J., (2002). Printed word frequency effects on semantic judgment: a comparison between event-related and block designs. [10110]. Presented at the 8th International Conference on Functional Mapping of the Human Brain, June 2-6, Sendai, Japan. Available on CD-Rom in NeuroImage, Vol. 16, No. 2
TALKS
Cross-Cultural Perspectives on Perception. Invited talk presented at the Osher Lifelong Learning Institute, Spring 2009 course on Cognition and Personality Across the Lifespan: Only as Old as You Think You Are, University of Illinois, Urbana-Champaign, IL. Aging, Culture, and Ventral Visual Selectivity. Presented at the 2008 Society for Neuroscience Annual Meeting, Washington, DC. Age and Culture Modulate the Ventral Visual Area. Presented at the Advanced Sensory Developmental Neuroscience Seminar, 2008, 17th March, University of Illinois, Urbana-Champaign, IL. Aging in Different Cultural Environments: Visual Brain Activity and Eye-Movements. Presented at the Beckman Graduate Student Seminar 2008, March 26th, University of Illinois, Urbana-Champaign, IL. Age Differences in Activations of a Frontal-Parietal Network Associated with Categorical and Coordinate Judgments. Presented at the 2007 Regional Symposium on MRI, University of Michigan, Ann Arbor, MI. Word Frequency and Subsequent memory Studied Using Event-Related fMRI. Presented at the Annual Scientific Meeting, 2003, Singapore General Hospital.
TEACHING EXPERIENCE
Psychological and Educational Statistics, Teaching Assistant, University of Illinois, Urbana-Champaign, IL, Fall 2008. Lab training on functional brain imaging analysis, University of Illinois, Urbana-Champaign, IL, 2007. Lab training on functional brain imaging analysis, Cognitive Neuroscience Laboratory, Singapore, 2005.
UNPUBLISHED WORK
Cognitive abilities in kindergartners and first graders: A comparison, evaluation, and extension of models using data from Robinson et al. (1996). Joshua Goh. Paper in fulfillment of class on Structural Equation Modelling at the University of Illinois at Urbana-Champaign, 2009. Morphed Faces. Joshua Goh. Stimuli collection, PAL Face Database. Available at https://pal.utdallas.edu/facedb/request/index/Morph, sourced 4th April 2009. Extension of the Von Der Malsburg Self-Organized Visual Cortex Model. Joshua Goh. Project in fulfillment of class on Neural Network at the University of Illinois at Urbana-Champaign, 2007. Backpropagation in a non-linear layered network: learning from past mistakes. Joshua Goh. Project in fulfillment of class on Neural Network at the University of Illinois at Urbana-Champaign, 2007. Hopfield Network. Joshua Goh. Project in fulfillment of class on Neural Network at the University of Illinois at Urbana-Champaign, 2007. Individual differences in interrogative suggestibility: finding an ERP correlate of recognition memory. Joshua Goh. Thesis in fulfillment of Honour’s degree at the National University of Singapore, Singapore, 2002.
ART WORK
Cover art, “Birthday Girl”, Journal of Cognitive Neuroscience, 18(4), 2006. Cover art, “Sam’s Brain”, Mind and Brain. Innovation: The Magazine of Research and Technology, 5(3), 2005.
PRESS COVERAGE
Pickens Gift Propels Brain Health Research. Dallas Business Business Journal, Dave Moore, 15th to 21st February 2008. Culture May Make and Impression. The DANA Foundation, Nicky Penttila, Released 4th June 2007. Available at http://www.dana.org/news/features/detail.aspx?id=8008, sourced on 4th April 2009. Culture Sculpts Neural Responses to Visual Stimuli, New Research Indicates. News Bureau, University of Illinois at Urbana-Champaign, Released 1st May 2007. Available at http://news.illinois.edu/news/07/0501culture.html, sourced on 4th April 2009.
COMPUTER SOFTWARE SKILLS
Fluent in Windows, Mac, Linux operating systems. Brain imaging analysis: BrainVoyager, SPM Other analysis software: Matlab, SPSS & AMOS, R

Tax Form 2009

I have submitted my tax form again this year. For the record, every year they ask me the same thing about how many times I've traveled in and out of the States in previous years, and I think...does that change every year? So this year I said I was in the States in 2004 from date A to date B, then in 2005 from date C to date D...etc. But next year should I say that in 2004 I was in the States from date E to date F? Basically, are they dumb?

Photos from winter trip 2008 - 2009

Finally manage to upload all the photos. This was the most awesome trip in the universe!

Tokyo, Kyoto, Osaka, Hakone, back to Tokyo again with Charlene and family. [other photos]

Taipei, and Changhua with Charlene and family. [other photos]

Staying with Atsunobu and his mum, then Yokohama. [other photos]

Visiting Sam in New York. [other photos]