This thesis examined the construct validity of the Revised Collett-Lester Fear of Death and Dying Scale in three separate studies. Study 1 (n =106) examined the relationship between the Collett-Lester subscales and the subscales of the Multidimensional Fear of Death and Dying Scale as well as measures of extraversion, neuroticism, and social desirability. Test-retest reliability over a 6-week period was found to be .82 and internal consistency values for the four subscales ranged from .77 to .86. A correlation was demonstrated between the Fear of Death and Dying Scale and the Multidimensional Fear of Death Scale. Neuroticism was found to relate to Death and Dying of others subscales, while extraversion, social desirability and gender were found to be unrelated to any of the four subscales. Study 2 (n =87) examined the sensitivity of the scale to an intervention designed to change attitudes to death and dying. Changes in attitudes were noted to be statistically significant with the experimental group following a six-week time frame. However, marginal increases in scores for the comparison group was also noted and replication of certain aspects of this study is advised. The third and final study examined the factor structure of the scale. Two sample sizes were used, 106 and 493. The data were subjected to principal component factor analysis using varimax and orthogonal rotational procedures. The results provided some support for two of the subscales. It is concluded that despite some psychometric weaknesses the Revised Collett-Lester Fear of Death and Dying Scale is a suitable instrument with which to measure death anxiety.