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Biomedical subjects

J Ong

Publications and source records attributed to J Ong.

At least 127 records · Page 7Linked to original sources
PubMed1980

Reliability, sex difference, and Honi phenomenon in a distorted room.

Test-retest reliability and sex differences when viewed in a distorted room were investigated. The presence of the Honi phenomenon, which is less change in apparent size of a spouse than of a stranger, was examined. A reliability coefficient was obtained by testing 27 college men twice. Judgments of size from 25 of the men and 25 women who viewed black disc targets and also from 10 women viewing husbands' and strangers' photographs were compared. The reliability was high, .87. Sex difference was significant. Women's larger reading was interpreted as a more meaningful or valuable perception of things than men's. The Honi phenomenon does not exist.

Adult↗
PubMed1979

Eye movements simultaneously recorded by electrooculographic and photoelectric methods.

Three types of eye movements, saccadic, reading, and pursuit, were recorded from 6 college subjects, two in each by the electrooculographic and photoelectric methods simultaneously. A deviation index (DI), which is the standard deviation divided by the mean, was devised to compare the precision of recording amplitude deflection, and a proportion index (PI), which is ml divided by M2, was devised to compare the mean amplitude indirectly between these two methods. Results showed that the proportion indexes of three types of eye movements were comparable, and the mean index of 0.54 indicated that the amplification in the electrooculographic method was about half as much as that in the photoelectric. The mean deviation index of 0.132 vs 0.135 was, again, comparable, meaning that these two methods of recording amplitude deflections are of about the same degree of magnitude and precision. Certain qualitative differences regarding the amplitude and velocity peak deflection between these two methods were also noted.

Electrooculography↗
PubMedDate not supplied

Use of capillary electrophoresis for thalassaemia screening.

This paper describes the use of high-performance capillary electrophoresis (HPCE) for screening of thalassaemias. Preparation of globin was performed by adding 1 mL of haemolysate to 20 volumes of cold acidified acetone. Separation of globins was accomplished in a 25 mM disodium phosphate buffer at pH 11.8 using an uncoated capillary column of 50 cm x 75 microns (i.d.). Distinct peaks of alpha, beta and gamma were resolved within 6 min. The coefficient of variations for within-day and between-day runs were 4.7% and 6.37%, respectively. Using this simple and rapid procedure up to 30 specimens could be analysed in a single day. This method appears to be reliable and can be used for mass screening of various haemoglobinopathies.

Electrophoresis↗