Korea University · Agricultural and Biological Sciences
Professor Yookyung Kim's research lab specializes in psychometric and statistical methodologies applied to mental health assessment, particularly focusing on age-related measurement bias in depression and personality disorder inventories using item response theory (IRT). The lab also investigates the functional and physicochemical properties of plant-based foods, such as soy products and whole grain breads, with an emphasis on texture, quality indicators, and bioactive components like dietary fiber and cholesterol-lowering agents. Additionally, the lab employs advanced spectroscopic techniques, such as FT-IR and PLS modeling, to analyze food composition without extensive sample preparation. Overall, the lab bridges psychological measurement with food science and analytical chemistry to improve health outcomes through better assessment tools and functional food development.
Figures are computed from collected data and may differ slightly.
The present analyses examined age-related measurement bias in responses to items on the revised Beck Depression Inventory (BDI) in depressed late-life patients versus midlife patients. Item response theory (IRT) models were used to equate the scale and to differentiate true-group differences from bias in measurement in the 2 samples. Baseline BDI data (218 late life and 613 midlife) were used for the present analysis. IRT results indicated that late-life patients tended to report fewer cognitive
The first goal of the present analyses was to shorten the five scales (Pilkonis, P. A., Kim, Y., Proietti, J. M., & Barkham, M. [1996]. Journal of Personality Disorders, 10, 355-369) for personality disorders (PDs) developed from the Inventory of Interpersonal Problems (IIP), thereby increasing their attractiveness for screening purposes. The second goal was to illustrate, for more general purposes, the utility of item response theory (IRT) for such scale refinement. IRT analyses were performed
Abstract The functional properties of soymilk and tofu prepared from Benning and Danbaekkong soy cultivars were identified. The protein content in soymilk was significantly higher for Danbaekkong, at 46.4 g kg −1 , than for Benning at 42.0 g kg −1 . The 11S/7S globulin ratios of Danbaekkong and Benning were estimated at 0.93 and 0.38, respectively. Soymilk from Danbaekkong was more non‐Newtonian ( n = 0.69) than soymilk from Benning ( n = 0.84). Tofu prepared from Danbaekkong was significantly h
Fourier transform mid-infrared (FT-IR) spectroscopy was investigated as a method of analysis for trans fatty acid content of cereal products without the need for prior oil extraction. Spectra were obtained, with an FT-IR spectrometer equipped with an attenuated total reflectance (ATR) device, of ground samples pressed onto the diamond ATR surface, and trans fatty acids were measured by a modification of AOAC Method 996.01. Partial least-squares (PLS) models were developed for the prediction of t
The purpose of this study was to identify the best fitting hierarchical factor structure of the subscales for personality disorders developed from the Inventory of Interpersonal Problems (IIP). In earlier work, 5 subscales associated with a diagnosis of personality disorder (PD) had been developed. With data collected from 5 additional samples at 4 sites (N = 1004), relations among the IIP-PD subscales were investigated using confirmatory factor analysis. Several competing models were tested, an
Hydroxypropyl methylcellulose (HPMC) is a substituted cellulose that reduces serum cholesterol at modest intake levels. HPMC has also been used for decades in gluten-free breads at a level to optimize loaf volume. Because consumers resist the consumption of whole wheat breads, the sensory and physical properties of all oat and barley breads incorporating HPMC were evaluated. Oat and barley also contain β-glucan, a glucose polymer similar to HPMC that also lowers cholesterol. The textural and sen
Female sex and marital status of divorced/widowed/separated were strongly associated with perceived depression. These two factors and food insecurity synergistically contributed to perceived depression.
Low-fat tofu produced by denaturing the two major soy proteins separately had improved textural qualities similar to full-fat tofu as a result of increased hydrophobic interactions between denatured protein molecules.
Our results confirmed that yuba could be used as edible film with a wide range of applications depending on types of additive and purpose of use. The results of the present study revealed that sodium carboxymethyl cellulose and glycerol-added yuba film had exceptional edible film properties, including water resistance, elongation and water vapor permeability based on principal component analysis. © 2018 Society of Chemical Industry.
The present analyses examined age-related measurement bias in responses to items on the revised Beck Depression Inventory (BDI) in depressed late-life patients versus midlife patients. Item response theory (IRT) models were used to equate the scale and to differentiate true-group differences from bias in measurement in the 2 samples. Baseline BDI data (218 late life and 613 midlife) were used for the present analysis. IRT results indicated that late-life patients tended to report fewer cognitive
This study developed the noodle from tofu. Tapioca starch and curdlan were added for improving texture and cooking quality. Tofu noodles were prepared with tapioca (50 g) (control), tapioca (20 g) and curdlan (5–7 g) (TC group), and curdlan (8–9 g) (C group). The viscosity decreased to control, TC and C, and both TC and C showed increasing capabilities as more curdlan was added. Cooking loss of TC (5.7–6.3%) or C (4.9–5.4%) was lower than that of the control (6.8%). C group showed the highest fi
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