Summary of the research articleThe purpose of the study was to assess link between the usage of social networking sites and onset of depression among older adolescents. It was hypothesized that usage of social networking sites causes depression in older adolescents.In the article, experience sample method was used. Total sample was of 373 undergraduate students, from which 273 participants completed the survey. Then from them, 193 participated in Experience Sampling method study. As sample, students of undergraduate programs within the ages of 18 and 23 years were employed from a preliminary communications progression to complete an online survey. The participants were awarded with course credits on completing the survey and were requested to join in the Experience Sampling Method phase. 43 surveys were administered to every single participant for 7 days by using text messages sent and received on participant’s personal cell phones. Administration of surveys was done randomly between the time intervals of 6 A.M to 1A.M.For analysis, logistic regression was used with the help of SAS software.Results of the research do not found any link between the usage of social media networking sites and onset of depression in older adolescents. The median time for the daily usage of social networking sites was found to be 28 minutes of the participants. Most of the participants use at less or medium level while minority of the sample was using social media networking sites at high levels.Sample size was limited and population was of one university. In future, more studies could be to make it more generalizable. More data collection and of different cultures may also has some effect on the social media networking usage.Stages of adolescentsThe time period between the stage of puberty and adulthood is called adolescence. It has three stages.Early adolescence (11-14years)Middle adolescence (15-17 years)Late adolescence (18-21years)There are 3 primary regions of subjective improvement that happen amid youth. In the first place, adolescents grow further developed thinking aptitudes, including the capacity to investigate a full scope of conceivable outcomes innate in a circumstance, think hypothetically and utilize an intelligent point of view.Second, adolescents build up the capacity to think uniquely. Adolescents move from being solid masterminds, who consider things that they have coordinate contact with or information about, to extract scholars, who can envision things not seen or experienced. This enables adolescents to have the ability to love, consider most profound sense of being, and take an interest in further developed science. Youth who stay at the level of a solid mastermind center to a great extent around physically present or genuine protests in critical thinking and, thus, may give trouble or disappointment with schoolwork as they progress all through secondary school. Clinicians can enable guardians to perceive this issue to enable adolescents to conform to the instructive pace.Adolescents may likewise encounter an individual tale because of having the capacity to think all the more uniquely. The individual story is based on the way that if the imaginary crowd (peers) is watching and considering the youthful, at that point the juvenile must be unique or extraordinary. For a considerable length of time, this juvenile egocentrism was thought to add to the individual tale of strength and hazard taking conduct.Third, the formal operational reasoning normal for puberty empowers adolescents to consider considering or meta-perception. This trademark enables youth to build up the ability to consider what they are feeling and how others see them. This point of view, joined with quick enthusiastic and physical changes that happen amid adolescence, makes most youth surmise that everybody is pondering what they are contemplating however about the young themselves.By late pre-adulthood, numerous youths have come to acknowledge nuances of circumstances and thoughts, and to extend into what’s to come. Their ability to take care of complex issues and to detect what others are thinking has honed significantly. But since they are still generally unpracticed throughout everyday life, even more established adolescents apply these freshly discovered abilities sporadically and in this manner may act without considering.At the stage of older adolescents which is the mid stage between adolescent and adulthood, when they are going to enter the stage of adults, many transformations at physiological and psychological levels go to occur. At this stage, individuals started their career and are more enthusiastic about building their name in their respective careers. This phase is struggling and more realistic as compared to the older adolescent. Interests changes from expectations to reality. The constructs become more solid than before and understanding of the world and decision making process grows enough to take influential decision and support them by logical reasoning.This article is about whatever is discussed in the textbook related to the development of the old adolescents. The result of this article is a supporting evidence of solid development of constructs related to the world. The results revealed no significant difference among the usage of social media networking sites and onset of depression among older adolescents which means the psychological development and the area of interest of older adolescents is based on the reality.