IOSR Journal Of Humanities And Social Science (IOSR-JHSS) Volume 22, Issue 7, Ver. 5 (July. 2017) PP 40-43 e-ISSN: 2279-0837, p-ISSN: 2279-0845. www.iosrjournals.org DOI: 10.9790/0837-2207054043 www.iosrjournals.org 40 | Page The Reliability of Mcmaster Family Assesment Device (Fad) Instruments Among Delinquent Teenagers Wan Nurayunee Bt Wan Zulkifli 1, Noor Azniza Bt Ishak 2, Zarina Bt Mat Saad 3 1 (Social Development Department, College of Arts and Sciences, UUM, 06010 Sintok, Kedah Darul Aman, Malaysia) Abstract: This article discussed the construct validity and reliability of the instrument Family Assessment Device (FAD). This instrument was approved by supervisors and pilot studies to obtain the credibility of the instrument among the delinquents. Results showed that the overall reliability value of this instrument was .971. The value of each construct in the instrument was also high although it was different. So, based on the findings, the reliability of the McMaster Family Assessment Device (FAD) instrument is high. Keywords: Validity, Reliability, Teenage Delinquent & Instruments Family Assessment Device (FAD) I. INTRODUCTION The rapidly developing era of development has indirectly affected the development of the youth itself. Failure to adapt to the environment, economy, social and so on, has little impact on teenagers' association and adaptation to the present situation. The role of parents as the most significant person with this group is also questioned. According to [1], the cause of teenage anti-social behaviour is due to inadequacy, inconsistency or inconsistent discipline during childhood. This explanation clearly demonstrates the importance of the role of parents in educating the children so that they are able to control their behaviour and mature in doing things. Therefore, parents should be sensitive to the development of the children they are particularly at adolescents. Parents are an important element in producing a generation that has the best human capital. It is a dream for every parent to love the children who are ethical and capable of self-reliance in today’s challenging world. The attitude and behaviour of members in the family, especially the children, actually affect the structure of a family. In order to produce quality generation, family functionality should be shaped so that it can be a factor that can help produce children capable of keeping their morals and attitudes. Social problems among teenagers are often associated with the loose of family systems or parenting skills. Therefore, the role and function of the family, especially parents, is very important because according to [2], family relationships are lifelong. This is because, parents and children will still be parents and children for a lifetime without any time boundary [3]. Thus, it clearly shows the role of parents and children in ensuring that harmony in the family is very important. The functionality in the family can indirectly reduce the risk of experts in families, especially teenagers who fall into social problems. Causes of juvenile delinquency are because parents do not serve as a good model for children. This statement shows the magnitude of the role of the parents in shaping the identity and behaviour of children. In order to produce quality generation, family functionality should be shaped so that it can be a factor that can help produce children who are capable of keeping their morals and attitudes. II. FAMILY FUNCTIONALITY DEFINITIONS According to [4], family functionality is a multidimensional constraint that demonstrates activity and interaction in a family in carrying out critical tasks in keeping family development and well-being as well as maintaining its integrity. Family functionality is also associated with behaviour related to family members it is not just limited to normal behaviour and even family can also form abnormal functionality [5]. Family functionality is a related form or process from time to time in the family [6]. Meanwhile, according to [7], family functions are also not one but diverse as it encompasses stabilising families ie stabilizing family economics, educating, preserving psychological and physical and family religious.