This investigation represents an initial attempt toward the construction of a general life cycle theory of parent-child relations. Emphasis was placed on the parent-adult child relationship with the onset of a filial crisis, e.g., due to illness. After the theory was described, two of the five propositions comprising this orientation (i.e., propositions four and five) were analyzed through a series of twenty-five hypotheses. The objectives of these hypotheses were (a) to analyze the relationship between the length of time involved in various patterns of filial responsibility and the likelihood that these patterns will become institutionalized as obligatory roles and (b) to determine how factors associated with these emergnt role obligations contribute to the cost of caregiving. A probability sample of 180 caregivers was obtained from within the Dallas/Ft. Worth area. Multiple and partial correlation analyses and the use of Student's t revealed that the length of time involved as a caregiver was significantly related to the number of informal caregiving roles performed by adult children. In addition, results indicated that the length of involvement in each caregiving role examined (i.e., household care, transportation service, personal care, medical attention, meal preparation, financial management and mobility assistance) was significantly related to (a) the frequency of providing these services to an aged parent and (b) the level of responsibility in each service area except financial management (which tended to remain constant over time)• An adult child s level of obligation to ensure that caregiving services were provided was also significantly associated with the length of caregiving involvement. Furthermore, this study found tentative support for the contention that the social-psychological cost of providing care for a dependent parent was associated with (a) the frequency of providing transportation services and medical attention, (b) the number of informal caregiving activities performed and (c) the length of caregiver involvement. A set of three control variables (i.e., the household living arrangements and both the aged parent s and adult child's physical health status) were identified as significant contributors to the cost of caregiving. Based on the empirical results of this investigation, propositions four and five of the theoretical perspective presented in this dissertation were supported.