The times and emergence of permanent teeth were ascertained by examining 1,263 Khasi children (615 males and 648 females), aged 5 to 15 years. Gingival emergence of the first 28 permanent teeth was recorded and the data were subjected to probit analysis to compute the mean (and standard deviation) emergence time of each individual tooth. Tooth emergence in females was markedly earlier than in males, and canines were most advanced in this respect. Females acquired all their teeth in shorter time span (5.5 years) than males (6.5 years). There were no decisive sex differences in the sequence of tooth emergence. The differences in emergence times between antimeres were statistically nonsignificant. The length of hiatus between two active emergence dental stages was shorter for the maxilla than for the mandible. It occurred between lateral incisor and first premolar in the maxilla of both the sexes, while in case of the mandible, it was spaced between lateral incisor and canine. The Khasis showed early emergence when compared to other populations. The findings support the earlier reports that the controls of deciduous-tooth emergence continue to play some part in emergence of the permanent dentition, especially the first permanent teeth that emerge.

The present study is based on one hundred eleventh grade students drawn from ten senior secondary schools of Ludhiana City. All the selected respondents had scored 80 per cent or above aggregate marks in their tenth standard examination and were thus labeled as 'high achievers'. Rotter's Locus of Control, Bhargava's Achievement Motivation Scale and Misra's Home Environment Inventory Scale were used to assess the locus of control, achievement motivation and quality of home environment, respectively. Results showed that good quality of home environment had significant positive correlation with 'high' level (P<0.001) of achievement motivation among high achievers. It was found that as the quality of home environment gets deteriorated, the level of achievement motivation also gets deteriorated. 'Internal' locus of control had significant positive correlation with quality of home environment. 'External' locus of control was non-significantly related with achievement levels and quality of home-environment. Significantly greater proportion of high achievers with 'average' level of achievement motivation showed 'internal' locus of control. Whereas distribution of high achievers with high and low levels of achievement motivation showed no significant difference for the internal and external locus of control.

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This study was conducted to assess the magnitude of psychological distress among migrant labourers. The study is based upon a sample of 240 labourers (18 years and above in age) drawn in equal numbers from four randomly selected villages and four cycle manufacturing units of Ludhiana district. The results revealed that migrant labourers had more psychological distress than the local labourers. The magnitude of psychological distress (inadequacy, anxiety, anger

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