PSYC FPX 3130 Case Study Assessment: Mental Health Analysis for Derek

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Capella University

PSYC-FPX3130 Criminal Psychology and Behavior

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Date

PSYC FPX 3130 Case Study Assessment: Mental Health Analysis of Derek

Derek’s case highlights the complexity of assessing mood instability, impulsive behavior, aggression, depressive symptoms, and psychotic experiences in a young adult with a history of recurrent psychiatric hospitalization. Bipolar I Disorder is a primary diagnostic consideration, particularly because of the reported manic-spectrum symptoms, including elevated or irritable mood, decreased need for sleep, racing thoughts, increased talkativeness, and risky behavior. However, a definitive diagnosis requires a comprehensive psychiatric evaluation to establish symptom duration, severity, functional impairment, and the relationship between mood episodes, psychotic symptoms, and substance use. Understanding Derek’s biological vulnerability, developmental history, environmental circumstances, and potential protective factors is essential for developing an appropriate assessment and treatment plan.

Biographical Data and Presenting Concerns

Derek is a 22-year-old unmarried African American male who has been accused of second-degree murder. His psychiatric history includes recurrent admissions to mental health institutions beginning at approximately 13 years of age. His reported behavioral concerns include emotional instability, impulsivity, aggression, difficulties regulating emotions, and challenges maintaining appropriate interpersonal boundaries.

These characteristics suggest a history of significant psychological and behavioral difficulties that warrants further investigation. However, the legal allegation should not be interpreted as evidence of a particular psychiatric diagnosis, and psychiatric symptoms alone cannot establish responsibility for criminal behavior. A comprehensive evaluation should examine Derek’s mental health history, current functioning, substance use, psychosocial experiences, and the circumstances surrounding his presentation.

PSYC FPX 3130 Case Study Assessment: Mental Health Analysis for Derek

Case Overview

Category	Details
Name	Derek
Age	22 years
Gender	Male
Race/Ethnicity	African American
Marital status	Unmarried
Legal concern	Accused of second-degree murder
Psychiatric history	Recurrent psychiatric hospitalizations beginning at approximately age 13
Primary behavioral concerns	Impulsivity, emotional instability, aggression, and difficulty with emotional regulation
Primary diagnostic consideration	Bipolar I Disorder, pending comprehensive evaluation
Proposed screening instrument	Mood Disorder Questionnaire (MDQ)

Derek’s symptoms should be assessed longitudinally rather than interpreted as isolated behaviors. Several psychiatric conditions can produce overlapping symptoms, making it important to determine when the difficulties began, how they have changed over time, and whether they occur independently of substance use or identifiable environmental stressors.

DSM-5-TR Symptom Analysis

The Diagnostic and Statistical Manual of Mental Disorders (DSM-5-TR) provides diagnostic criteria for evaluating mood disorders, anxiety disorders, psychotic disorders, and other mental health conditions (American Psychiatric Association [APA], 2022). Derek’s reported presentation includes depressive, manic-spectrum, anxiety-related, and psychotic symptoms. Although these symptoms provide important diagnostic clues, the available case information does not establish that every symptom meets the required diagnostic threshold.

Depressive Symptoms

Derek reportedly demonstrates symptoms associated with depression, including loss of interest or pleasure, psychomotor agitation or retardation, difficulty concentrating or making decisions, and recurrent suicidal ideation or behavior.

Other symptoms, such as persistent depressed mood, significant appetite or weight changes, sleep disturbances, fatigue, and excessive guilt or feelings of worthlessness, have not been clearly established in the available information.

Depressive symptoms are clinically important because individuals with bipolar disorder may experience major depressive episodes in addition to manic episodes. Suicidal ideation or behavior requires particular attention because it can indicate an immediate safety concern. Clinicians should assess the frequency and intensity of suicidal thoughts, intent, planning, access to lethal means, previous attempts, and protective factors. If Derek presents with imminent suicide risk, immediate safety interventions and appropriate emergency psychiatric care are necessary.

Manic Symptoms

Derek reportedly exhibits several symptoms associated with mania, including abnormally elevated or irritable mood, decreased need for sleep, increased talkativeness, racing thoughts or flight of ideas, distractibility, and risky or impulsive behavior.

These symptoms are relevant to Bipolar I Disorder because manic episodes can involve increased energy, impaired judgment, changes in communication, and difficulty controlling behavior. In severe cases, mania may significantly disrupt occupational, educational, social, and interpersonal functioning.

However, the available information does not clearly establish grandiosity or increased goal-directed activity. More importantly, a clinician must determine whether Derek experienced a distinct period of mood and energy changes lasting at least one week, or any duration if hospitalization was necessary, with the required severity and functional impairment. Psychotic features or the need for hospitalization can indicate severe mania, but the reason for each hospitalization must be established.

Therefore, Derek’s symptoms warrant assessment for a manic episode, but the information provided is insufficient to confirm that he meets all diagnostic criteria.

Anxiety-Related Symptoms

Derek also reportedly demonstrates excessive anxiety or worry, difficulty controlling worry, restlessness, concentration difficulties, irritability, muscle tension, and sleep disturbances.

These symptoms may occur alongside bipolar disorder, but they can also indicate a separate anxiety disorder or another underlying condition. Sleep disturbances and irritability, for example, may occur during manic episodes, depressive episodes, periods of substance use, or heightened psychological stress.

A clinical assessment should determine whether Derek’s anxiety symptoms persist outside mood episodes, how long they have been present, and whether they interfere with daily functioning. This information can help establish whether anxiety represents a separate diagnosis or a feature of another psychiatric condition.

Psychotic Symptoms

Derek’s reported presentation includes hallucinations and grossly disorganized or catatonic behavior. The case information does not establish the presence of delusions lasting at least one month or disorganized speech.

Hallucinations may occur during severe manic or depressive episodes with psychotic features. They can also occur in schizophrenia-spectrum disorders, substance-induced psychotic disorders, and certain medical or neurological conditions.

An important diagnostic consideration is the relationship between Derek’s psychotic symptoms and mood episodes. If psychotic symptoms occur exclusively during severe mood episodes, a mood disorder with psychotic features may be considered. If psychosis occurs for a substantial period independently of prominent mood episodes, a schizophrenia-spectrum or other diagnosis may warrant further investigation.

Clinicians should also assess the content, frequency, onset, and impact of the hallucinations, along with Derek’s level of insight and any associated safety concerns.

Diagnostic Impression: Bipolar I Disorder

Bipolar I Disorder is the primary diagnostic consideration for Derek because his reported symptoms include elevated or irritable mood, decreased need for sleep, increased talkativeness, racing thoughts, distractibility, impulsive behavior, and possible psychotic features. His reported depressive symptoms and history of recurrent psychiatric hospitalization further support the need for a detailed evaluation of mood episodes (APA, 2022).

Bipolar I Disorder is characterized by at least one manic episode. A major depressive episode may occur but is not required for the diagnosis. A manic episode involves a distinct period of abnormally elevated, expansive, or irritable mood and increased activity or energy, accompanied by additional symptoms and significant impairment.

Derek’s presentation is consistent with several features associated with mania. Nevertheless, symptom overlap alone cannot establish Bipolar I Disorder. A qualified clinician must evaluate the duration and severity of the reported symptoms, the pattern of mood changes, the degree of functional impairment, and possible alternative explanations.

Rationale for the Diagnostic Consideration

Several aspects of Derek’s history support investigating Bipolar I Disorder.

First, his reported elevated or irritable mood, decreased need for sleep, racing thoughts, increased talkativeness, distractibility, and risky behavior overlap with symptoms associated with mania. Second, his history of recurrent psychiatric hospitalization suggests substantial mental health difficulties that require clarification through previous medical records and clinical interviews. Third, the reported depressive symptoms indicate that his presentation may involve changes in mood across different periods.

His hallucinations also warrant investigation because psychotic symptoms can accompany severe mood episodes. Research has documented auditory verbal hallucinations among some individuals with Bipolar I Disorder, although hallucinations are not specific to bipolar disorder and cannot establish the diagnosis on their own (Javier et al., 2025).

Derek’s impulsivity and aggression should also be assessed in context. These behaviors may occur during periods of severe mood disturbance, intoxication, emotional distress, or other psychiatric conditions. They should not automatically be attributed to bipolar disorder without evidence connecting them to particular symptoms or episodes.

Differential Diagnosis

A comprehensive evaluation should consider several possible explanations for Derek’s symptoms.

Bipolar I Disorder with psychotic features: This possibility should be investigated if psychotic symptoms occur during severe manic or depressive episodes.

Schizophrenia-spectrum disorders: These conditions should be considered if psychotic symptoms persist independently of prominent mood episodes or if other diagnostic features are present.

Substance-induced mood or psychotic disorders: Cannabis and other psychoactive substances may contribute to changes in mood, perception, sleep, judgment, and behavior. The timing of symptoms in relation to substance use is therefore important.

Anxiety disorders: Persistent and difficult-to-control anxiety may represent a separate condition if it meets the relevant diagnostic criteria.

Trauma-related and personality disorders: Trauma exposure, persistent interpersonal difficulties, impulsivity, and emotional dysregulation may warrant assessment for other conditions. However, these symptoms alone do not establish a trauma-related or personality disorder.

Medical and neurological conditions: Certain illnesses, medications, and neurological problems can produce psychiatric symptoms. Medical evaluation is necessary when clinically indicated.

This differential approach reduces the risk of misdiagnosis and supports more appropriate treatment planning.

Biological Origins of Bipolar Disorder

Bipolar disorder is a complex psychiatric condition associated with genetic vulnerability, neurobiological processes, environmental influences, and disruptions in sleep and circadian rhythms. No single biological mechanism fully explains the condition. Current research supports a multifactorial understanding in which several systems may contribute to mood regulation and vulnerability to manic or depressive episodes (Oliva et al., 2025).

Genetic and Neurobiological Factors

Genetic factors can influence susceptibility to bipolar disorder. Research suggests that the condition is polygenic, meaning that numerous genetic variations may contribute to vulnerability rather than one single gene determining whether someone develops the disorder.

Neurobiological processes involving neurotransmitter systems, emotional regulation, reward processing, and communication between brain networks may also contribute to mood instability. Dopamine and serotonin are among the neurotransmitters studied in relation to mood and behavior, although bipolar disorder cannot be explained by a simple imbalance in either substance.

For Derek, a detailed family psychiatric history could help clarify whether there is a familial pattern of mood disorders or other psychiatric conditions. However, the available case information does not establish that he has a specific genetic predisposition.

Sleep and Circadian Rhythm Disruption

Sleep and circadian rhythm disturbances are important considerations in bipolar disorder. Changes in sleep patterns can accompany mood episodes, and disrupted sleep may contribute to worsening mood instability in vulnerable individuals.

Derek’s reported decreased need for sleep should be explored carefully. Clinicians should distinguish a reduced need for sleep accompanied by sustained energy from insomnia in which a person wants to sleep but cannot. The distinction can help clarify whether the symptom is consistent with mania or another condition.

A treatment plan that includes regular sleep routines, monitoring of mood changes, and strategies to reduce sleep disruption may support long-term symptom management.

Learning, Environmental, and Situational Factors

Biological vulnerability does not operate independently of an individual’s experiences. Family relationships, chronic stress, trauma, social conditions, and coping strategies may influence the course and severity of psychiatric symptoms.

Derek’s early behavioral difficulties and history of psychiatric hospitalization suggest the importance of investigating his developmental and social environment. Clinicians should explore possible family conflict, childhood adversity, unstable relationships, educational difficulties, and other experiences that may have affected his emotional development.

These factors should be investigated rather than assumed. The available case information does not establish that Derek experienced a particular traumatic event or family circumstance.

Substance Use and Behavioral Risk

Derek’s reported early marijuana use and risky sexual behavior are relevant to the assessment. Cannabis and other psychoactive substances may complicate psychiatric presentations by affecting perception, sleep, emotional regulation, judgment, and behavior. In some individuals, substance use may contribute to psychotic symptoms or worsen an existing psychiatric condition.

A detailed substance-use history should establish which substances Derek has used, the frequency and amount of use, the age of onset, and the relationship between substance use and his psychiatric symptoms. Clinicians should determine whether symptoms developed before substance use, during intoxication, following use, or during withdrawal.

This information is particularly important when distinguishing Bipolar I Disorder from substance-induced mood or psychotic disorders. Substance use may coexist with bipolar disorder, so identifying one does not automatically rule out the other.

Developmental Risk Factors

Derek’s reported psychiatric difficulties began during adolescence, a developmental period characterized by significant changes in social relationships, emotional regulation, and independence. Early onset of serious psychiatric symptoms can interfere with educational progress, relationships, decision-making, and the development of effective coping strategies.

Potential developmental risk factors that warrant assessment include early emotional dysregulation, impulsivity, aggression, family psychiatric history, adverse childhood experiences, substance use, and inconsistent access to mental health care.

Derek’s history of hospitalization beginning at approximately age 13 makes it especially important to review previous diagnoses, treatment responses, medication history, and the circumstances surrounding each admission. This longitudinal information may help clarify whether his symptoms have followed a pattern consistent with bipolar disorder or another condition.

Protective Factors and Strategies for Recovery

Although Derek has several reported clinical concerns, protective factors may improve his prospects for stability and recovery. Protective factors are personal, interpersonal, and environmental resources that can reduce risk and support effective coping.

Potential protective factors include consistent psychiatric care, supportive relationships, access to appropriate treatment, stable housing, meaningful daily activities, and engagement in psychotherapy. Their actual presence in Derek’s life must be assessed rather than assumed.

A comprehensive care plan could incorporate the following strategies:

• Psychiatric treatment: Regular assessment by a qualified mental health professional, with medication considered when clinically indicated.

• Psychotherapy: Evidence-based approaches that support emotional regulation, coping skills, stress management, and recognition of early warning signs.

• Substance-use intervention: Screening, education, and appropriate treatment if substance use is contributing to psychiatric symptoms.

• Sleep and routine management: Consistent sleep schedules and monitoring of changes in mood, energy, and activity.

• Social support: Involvement of trusted family members or other support persons when appropriate and consistent with Derek’s consent and clinical needs.

• Safety planning: Individualized assessment of suicide risk, aggression risk, psychotic symptoms, and the need for crisis intervention.

• Continuity of care: Follow-up appointments, medication monitoring when applicable, and coordination between psychiatric, medical, and community services.

Treatment should be tailored to the findings of a comprehensive assessment. The goal is to reduce symptoms, improve daily functioning, address safety concerns, and support long-term stability.

Proposed Psychological Assessment: Mood Disorder Questionnaire

The Mood Disorder Questionnaire (MDQ) is a self-report screening instrument designed to identify symptoms associated with bipolar-spectrum disorders. It asks about experiences such as elevated mood, increased energy, reduced need for sleep, increased talkativeness, racing thoughts, distractibility, and risky behavior. It also assesses whether reported symptoms occurred during the same period and whether they caused problems or impairment.

The MDQ may be appropriate for Derek because his reported history includes several symptoms associated with mania. The instrument could help organize information about previous mood changes and identify whether a more detailed bipolar-disorder assessment is warranted.

However, the MDQ is a screening instrument rather than a diagnostic test. A positive result does not confirm Bipolar I Disorder, and a negative result does not necessarily exclude it. The results should be interpreted alongside a clinical interview, psychiatric history, mental status examination, substance-use assessment, and collateral information when available.

Reliability and Validity of the MDQ

Research has examined the MDQ’s psychometric characteristics and its relationship with bipolar disorder. For example, Mundy et al. (2023) investigated genetic associations involving MDQ responses and bipolar disorder, contributing to research on the characteristics measured by the instrument.

Nevertheless, the MDQ has limitations. Its accuracy can vary according to the population and clinical setting in which it is used. Symptoms such as irritability, distractibility, impulsivity, and sleep disturbance may occur in multiple psychiatric conditions. People may also have difficulty recalling the timing and severity of previous mood episodes.

For Derek, the MDQ should therefore be used as one component of a broader assessment. His reported symptoms, history of psychiatric hospitalization, and possible substance-related concerns require a more detailed evaluation than a screening questionnaire can provide.

Recommended Population

The MDQ is commonly used with adults when clinicians suspect bipolar-spectrum symptoms. Its suitability depends on the person’s comprehension, ability to recall symptoms, and the setting in which the assessment occurs.

Because Derek is 22 years old, the instrument may be appropriate as an initial screening measure. His psychiatric history beginning in adolescence also makes it important to obtain developmental information and, where appropriate, records from previous treatment episodes.

Scientific Evidence and Clinical Application

The MDQ assesses symptom domains that are relevant to bipolar-spectrum conditions, including changes in mood, energy, sleep, thought processes, communication, and risk-taking behavior.

In Derek’s case, a clinician could use the MDQ to explore whether these experiences occurred together in distinct periods rather than as isolated symptoms. A follow-up interview should clarify the onset, duration, frequency, severity, and consequences of each reported episode.

The assessment should also explore whether psychotic symptoms occurred during mood episodes, whether symptoms were temporally associated with substance use, and whether medical conditions or prescribed medications could have contributed to the presentation.

The MDQ can support clinical decision-making, but the final diagnosis must be based on the complete clinical picture and applicable diagnostic criteria.

Clinical Safety and Assessment Considerations

Derek’s reported suicidal ideation, hallucinations, impulsivity, aggression, and legal circumstances make a structured safety assessment particularly important. These concerns require individualized evaluation rather than assumptions about his level of risk.

Clinicians should assess current suicidal thoughts, intent, planning, previous attempts, thoughts of harming others, access to weapons or other lethal means, command hallucinations, substance intoxication, and the ability to maintain personal safety. Any imminent risk requires prompt clinical intervention and an appropriate level of care.

A comprehensive evaluation should include a mental status examination, psychiatric and medical history, medication review, substance-use screening, and review of previous hospital records when available. Collateral information may help clarify the course of symptoms, particularly when memory, insight, or current mental state affects the reliability of self-report.

Because Derek is involved in a criminal case, clinical diagnosis and forensic opinions should remain distinct. A psychiatric diagnosis alone does not establish criminal responsibility, intent, or legal competency. Those questions require appropriate evaluations conducted under the applicable legal standards.

Conclusion

Derek’s case illustrates the complexity of assessing severe mood disturbances, psychotic symptoms, impulsive behavior, and emotional instability in a young adult with a history of recurrent psychiatric hospitalization. Bipolar I Disorder is an important diagnostic consideration because of his reported manic-spectrum symptoms, including elevated or irritable mood, decreased need for sleep, racing thoughts, increased talkativeness, distractibility, and risky behavior. However, the available information is insufficient to establish a definitive diagnosis.

Biological vulnerability, developmental experiences, environmental stressors, and substance use may interact to influence psychiatric symptoms and functioning. A thorough differential diagnosis should consider schizophrenia-spectrum disorders, substance-induced conditions, anxiety disorders, trauma-related conditions, and relevant medical causes.

The Mood Disorder Questionnaire may provide useful preliminary information about bipolar-spectrum symptoms, but it cannot replace a comprehensive clinical assessment. Effective care should be individualized and may include psychiatric treatment, psychotherapy, substance-use intervention, sleep management, safety planning, and continued monitoring. A coordinated approach can help clarify Derek’s diagnosis, address immediate clinical concerns, and support improved long-term functioning.

Frequently Asked Questions

What is the most likely diagnosis in Derek’s case?

Bipolar I Disorder is the primary diagnostic consideration because Derek reportedly demonstrates manic-spectrum symptoms, depressive symptoms, impulsive behavior, and possible psychotic features. However, a formal diagnosis requires confirmation of a manic episode and assessment of alternative explanations, including substance-related and schizophrenia-spectrum disorders.

Why is Bipolar I Disorder being considered for Derek?

Derek’s reported elevated or irritable mood, decreased need for sleep, increased talkativeness, racing thoughts, distractibility, and risky behavior are consistent with several symptoms associated with mania. His psychiatric hospitalization history and depressive symptoms provide additional reasons for a comprehensive mood-disorder assessment.

Can hallucinations occur in Bipolar I Disorder?

Yes. Hallucinations can occur during severe manic or depressive episodes with psychotic features. However, they can also occur in other psychiatric, substance-related, and medical conditions. Clinicians must determine whether the hallucinations occur exclusively during mood episodes or independently of them.

What is the Mood Disorder Questionnaire?

The Mood Disorder Questionnaire is a self-report screening instrument used to identify symptoms associated with bipolar-spectrum disorders. It assesses experiences such as elevated mood, increased energy, reduced need for sleep, racing thoughts, distractibility, and impulsive behavior.

Can the MDQ diagnose bipolar disorder?

No. The MDQ is a screening instrument, not a standalone diagnostic test. Its results must be interpreted alongside a psychiatric interview, longitudinal symptom history, mental status examination, substance-use assessment, and evaluation of other possible causes.

What biological factors are associated with bipolar disorder?

Bipolar disorder is associated with genetic vulnerability, neurobiological processes, emotional regulation networks, and disruptions in sleep and circadian rhythms. These factors may interact with environmental stressors and individual experiences, contributing to the development and course of mood episodes.

How can substance use affect Derek’s psychiatric symptoms?

Substance use may worsen mood instability, sleep disruption, impulsivity, and psychotic symptoms. It can also complicate diagnosis by producing symptoms that resemble a primary psychiatric disorder. Clinicians should establish the timing of symptoms in relation to intoxication, ongoing use, and withdrawal.

What protective factors could improve Derek’s mental health outcomes?

Potential protective factors include consistent psychiatric care, appropriate medication when prescribed, psychotherapy, supportive relationships, substance-use treatment when needed, regular sleep routines, safety planning, and access to community mental health services. The assessment should determine which resources are available and appropriate for Derek.

Why is a differential diagnosis important in Derek’s case?

A differential diagnosis helps clinicians distinguish Bipolar I Disorder from conditions that may produce similar symptoms, including schizophrenia-spectrum disorders, substance-induced disorders, anxiety disorders, and certain medical conditions. Accurate diagnosis supports appropriate treatment and reduces the risk of overlooking contributing factors.

Does a psychiatric diagnosis explain Derek’s alleged criminal behavior?

No. A psychiatric diagnosis alone cannot explain or establish the cause of a specific alleged criminal act. Clinical and forensic evaluations must consider the individual’s symptoms, functioning, circumstances, and the applicable legal standards without assuming that mental illness necessarily causes violence.

References

American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.). American Psychiatric Association Publishing. https://doi.org/10.1176/appi.books.9780890425787

Bartol, C. R., & Bartol, A. M. (2020). Criminal behavior: A psychological approach (12th ed.). Pearson.

First, M. B. (2024). DSM-5-TR handbook of differential diagnosis. American Psychiatric Association Publishing.

Javier, A., Jaworska, N., Fiedorowicz, J., Magnotta, V., Richards, J. G., Barsotti, E. J., & Wemmie, J. A. (2025). Characteristics of people with bipolar disorder I with and without auditory verbal hallucinations. International Journal of Bipolar Disorders, 13(1). https://doi.org/10.1186/s40345-025-00369-8

PSYC FPX 3130 Case Study Assessment: Mental Health Analysis for Derek

Mundy, J., Hübel, C., Adey, B. N., Davies, H. L., Davies, M. R., Coleman, J. R., Hotopf, M., Kalsi, G., Lee, S. H., McIntosh, A. M., Rogers, H. C., Eley, T. C., Murray, R. M., Vassos, E., & Breen, G. (2023). Genetic examination of the Mood Disorder Questionnaire and its relationship with bipolar disorder. American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, 192(7–8), 147–160. https://doi.org/10.1002/ajmg.b.32938

Oliva, V., Fico, G., De Prisco, M., Gonda, X., Rosa, A. R., & Vieta, E. (2025). Bipolar disorders: An update on critical aspects. The Lancet Regional Health – Europe, 48, Article 101135. https://doi.org/10.1016/j.lanepe.2024.101135