Clinical Psychology: History, Practice, and Modern Trends

Introduction to Clinical Psychology

Although relatively young as a profession, clinical psychology is described as "one of the most vigorous fields of psychology" (Reisman, 1991, p. 3). Clinical psychology refers generally to both social science research and the application of that research to achieve specific clinical goals related to mental health. Since its inception in the 1890s, the field has changed and evolved dramatically (Benjamin, 2005). The earliest forms of clinical psychology included working with asylum patients, which often entailed using a variety of techniques now deemed unethical or harmful. The rise of psychoanalysis based on Freud's teachings made the 20th century an era in which talk therapy prevailed. Research on different models of talk therapy has since informed best practices more broadly.

However, recent changes to the field of clinical psychology attempt to distinguish between the types of quantifiable evidence that can be gained from empirical research using psychopharmacological interventions on the one hand, and less tangible, less measurable means such as counseling on the other. Clinical psychology seeks to establish itself as a social science, which is why research and statistics play a major role in the field.

Distinguishing Clinical Psychology from Related Fields

Clinical psychology distinguishes itself from other social science professions in a number of ways. The field is also notably broad. Generally, clinical psychology emphasizes research and evidence-based practice, and it has considerable overlaps with other disciplines including psychiatry and counseling psychology. As clinical psychology is focused on individual or micro-level variables of analysis, the field is clearly distinguished from that of social work. Clinical psychology also relies on both qualitative and quantitative research methods. Unlike psychiatry, clinical psychology does not necessarily depend on medical interventions, though it does include them when research indicates they are appropriate. Because clinical psychologists are not medically trained as psychiatrists are, they are not legally permitted to prescribe pharmacological interventions. Clinical psychologists therefore frequently work with other members of a healthcare team, including psychiatrists and social workers.

The Research–Practice Gap and Evidence-Based Standards

Some clinical psychologists remain dedicated to scientific research or academia, while others are primarily practitioners. Researchers inform practice, but clinical data is often gathered not from real-world interventions but from targeted clinical trials. It is difficult to bridge the gap between research and practice, as professional clinical psychologists who see clients exclusively and do not engage in research may become disconnected from emerging science, potentially failing to provide clients with the most effective or current interventions. As Lilienfeld, Lynn, and Lohr (2015) point out, one of the most significant problems in clinical psychology is that practitioners "routinely neglect research evidence" and "commonly administer therapeutic and assessment methods that are either unsupported or inadequately tested" (p. 1). Just as lobotomies and other invasive procedures characterized some of the early failures of the field, pseudoscientific therapies remain an issue affecting both the credibility of the profession and client outcomes.

Ideally, clinical psychologists remain ethically and professionally committed to evidence-based practice. Clinical psychologists are, however, entitled to recommend or even perform therapeutic interventions not necessarily rooted in evidence, provided those interventions may still benefit the client and professional ethical standards are maintained (Barlow, 2011). It is important to note that even some of the most established trends in clinical psychology may not be strictly scientific in nature. For example, Freudian psychoanalysis — long a standard talk therapy modality — has not necessarily demonstrated effectiveness with statistical significance (Lilienfeld, Lynn & Lohr, 2015). Clinical psychology cannot be an exact or hard science.

Professional Organizations, the DSM, and Diagnostic Challenges

Professional organizations like the American Psychological Association have ensured that the field and its practitioners maintain standards that evolve over time to reflect current scientific evidence. After World War Two, clinical psychology expanded significantly, giving rise to systematic diagnoses and treatment programs designed to align the field more closely with medicine. A major landmark in the field was the publication of the Diagnostic and Statistical Manual of Mental Disorders (DSM), which is currently in its fifth edition. The manual serves as a foundational reference in the field, informing clinicians about the signs and symptoms of various mental disorders and psychiatric conditions. Using the DSM ensures that licensed clinical professionals make diagnoses based on professional standards, even when those judgments are subjective and potentially subject to bias.

Even the mental health conditions outlined in the DSM reflect cultural biases and social norms, which is why conditions and their characteristic features often change over time. For example, homosexuality was once officially pathologized (Barlow, 2011). Shifts in social norms can be particularly problematic for clinical psychologists attempting to enhance the legitimacy of the profession. Misdiagnosis and over-diagnosis can lead to problems such as stigmatization and labeling, potentially worsening pre-existing psychological or social difficulties. On the one hand, clinical trials ensure that treatment interventions have been shown to be effective with specific populations at specific times. On the other hand, the efficacy of interventions depends on a wide range of micro-level, meso-level, and macro-level variables. An over-reliance on quantifiable evidence has created pressure on clinical psychologists to recommend psychopharmacological avenues rather than talk therapy and other non-medical interventions. It is therefore important for clinical psychologists to acknowledge that their field blends art and science, while avoiding pseudoscientific and therefore unethical interventions.

References

Barlow, D. H. (2011). The Oxford handbook of clinical psychology. Oxford University Press.

Benjamin, L. T. (2005). A history of clinical psychology as a profession in America. Annual Review of Clinical Psychology, 1, 1–30.

Lilienfeld, S. O., Lynn, S. J., & Lohr, J. M. (2015). Science and pseudoscience in clinical psychology. The Guilford Press.

Reisman, J. M. (1991). A history of clinical psychology. Brunner-Routledge.