Psychiatric Assessment and Diagnosis — MCQs

Psychiatric Assessment and Diagnosis Indian Medical PG Practice Questions and MCQs

Question 151: Hallucinations and illusions are disturbances of which of the following?

A. Thought
B. Perception (Correct Answer)
C. Sensation
D. Mood

Explanation: **Explanation:** The correct answer is **Perception**. Perception is the process of interpreting and organizing sensory information to understand the environment. Disturbances in this process manifest as hallucinations and illusions. * **Hallucinations:** Defined as a false sensory perception in the **absence** of an external stimulus (e.g., hearing voices when no one is speaking). * **Illusions:** Defined as a misinterpretation of a **real** external sensory stimulus (e.g., mistaking a rope for a snake in the dark). **Analysis of Incorrect Options:** * **A. Thought:** Disturbances of thought are categorized into disorders of **form** (e.g., loosening of associations), **content** (e.g., delusions, obsessions), and **stream** (e.g., flight of ideas). While hallucinations often occur in thought disorders like Schizophrenia, they are technically sensory-perceptual errors. * **C. Sensation:** Sensation is the raw biochemical process of detecting stimuli (via eyes, ears, etc.). In hallucinations, the sensory organs are usually intact; the error lies in the brain's perceptual processing. * **D. Mood:** Mood refers to a sustained internal emotional state. Disturbances include depression or mania. While mood disorders can have psychotic features (mood-congruent hallucinations), the symptoms themselves are perceptual. **NEET-PG High-Yield Pearls:** 1. **Hypnagogic vs. Hypnopompic:** Hallucinations while falling asleep (Hypna**go**gic = **Go**ing to sleep) vs. waking up (**P**ompic = **P**ost-sleep/awakening). 2. **Lilliputian Hallucinations:** Seeing people/objects as smaller than they are (common in Alcohol Withdrawal/Delirium Tremens). 3. **Functional Hallucination:** A stimulus triggers a hallucination in the *same* modality (e.g., hearing voices only when the tap is running). 4. **Reflex Hallucination:** A stimulus in one sensory modality triggers a hallucination in *another* (e.g., seeing colors when hearing music).

Question 152: The phenomenon of déjà vu is best described as:

A. A sense that familiar surroundings appear unfamiliar.
B. A sense that unfamiliar surroundings appear familiar. (Correct Answer)
C. An inability to recall a familiar name.
D. A feeling of detachment from one's own body.

Explanation: **Explanation:** **Déjà vu** (French for "already seen") is a phenomenon of **paramnesia** where an individual experiences a distinct sense of familiarity when encountering a completely new or unfamiliar situation. It is a disturbance of memory recognition where the feeling of "knowing" occurs without a prior objective basis. **Analysis of Options:** * **Option B (Correct):** This accurately defines déjà vu. The person feels they have lived through the current, unfamiliar situation before. * **Option A (Incorrect):** This describes **Jamais vu** (French for "never seen"). It is the failure to recognize a familiar situation, leading to a sense of strangeness or novelty despite knowing the environment is familiar. * **Option C (Incorrect):** This refers to **Lethologica** or the "tip-of-the-tongue" phenomenon, which is a temporary failure of memory retrieval. * **Option D (Incorrect):** This describes **Depersonalization**, a dissociative symptom where an individual feels like an outside observer of their own body or mental processes. **Clinical Pearls for NEET-PG:** * **Localization:** Déjà vu is most commonly associated with the **Temporal Lobe**. * **Clinical Significance:** While it occurs in healthy individuals (often due to fatigue or stress), frequent or prolonged déjà vu is a classic "aura" or symptom of **Temporal Lobe Epilepsy (TLE)**. * **Related Terms:** * *Déjà entendu:* Feeling that something heard for the first time is familiar. * *Déjà pensé:* Feeling that a new thought has been thought before. * **Classification:** In psychiatry, these are categorized under **Disorders of Memory** (specifically Paramnesias).

Question 153: A person is found wandering away from home with loss of recent memory and depersonalization. What is the most likely diagnosis?

A. Dissociative fugue (Correct Answer)
B. Dissociative amnesia
C. Dissociative identity disorder
D. None of the above

Explanation: **Explanation:** The clinical presentation of wandering away from home (bewildered travel) combined with memory loss is the hallmark of **Dissociative Fugue**. **1. Why Dissociative Fugue is Correct:** Dissociative Fugue (classified under Dissociative Amnesia in DSM-5) is characterized by sudden, unexpected travel away from one's home or customary place of daily activities, accompanied by an inability to recall some or all of one's past. Patients often experience confusion about their personal identity or may even assume a new identity. The "wandering" aspect is the pathognomonic feature that distinguishes it from simple amnesia. **2. Why Other Options are Incorrect:** * **Dissociative Amnesia:** While fugue involves amnesia, the term "Dissociative Amnesia" alone usually refers to the inability to recall important personal information (often of a traumatic nature) *without* the component of purposeful wandering or identity replacement. * **Dissociative Identity Disorder (DID):** This involves the presence of two or more distinct personality states that recurrently take control of behavior. While amnesia is present, the primary feature is the "switching" between personalities, not necessarily wandering away from home. **Clinical Pearls for NEET-PG:** * **Trigger:** Fugue states are usually precipitated by severe psychosocial stress (e.g., marital conflict, financial ruin, or wartime trauma). * **Recovery:** Recovery is typically rapid and spontaneous; however, the patient may remain amnestic for the events that occurred *during* the fugue state. * **ICD-10 vs. DSM-5:** In ICD-10, Dissociative Fugue is a separate diagnosis. In DSM-5, it is now a "specifier" under Dissociative Amnesia. * **Key Differentiator:** If the question mentions **"travel"** or **"wandering"** + **"memory loss,"** always think of Fugue.

Question 154: Reflex hallucination is a morbid variety of -

A. Kinesthesia
B. Parasthesia
C. Hyperesthesia
D. Synesthesia (Correct Answer)

Explanation: **Explanation:** **Reflex Hallucination** is a morbid variety of **Synesthesia**. Synesthesia is a phenomenon where a stimulus in one sensory modality (e.g., hearing) triggers a real perception in another sensory modality (e.g., vision). In a reflex hallucination, a sensory stimulus in one field leads to a hallucinatory perception in another field. For example, a patient may experience a visual hallucination of a person standing next to them every time they hear a specific sound. This represents a "reflex" cross-activation between different sensory pathways. **Analysis of Incorrect Options:** * **Kinesthesia (A):** Refers to the perception of body movement and position. While there are "Kinesthetic hallucinations" (feeling like one is moving or flying), they do not involve the cross-modal sensory triggering seen in reflex hallucinations. * **Paresthesia (B):** This is a spontaneous abnormal sensation, such as "pins and needles," typically caused by peripheral nerve irritation. It is a neurological symptom rather than a complex psychiatric hallucination. * **Hyperesthesia (C):** Refers to an increased sensitivity to sensory stimuli (e.g., sounds appearing abnormally loud). It involves an intensity change within a single modality, not a cross-modal reflex. **NEET-PG High-Yield Pearls:** * **Functional Hallucination:** A stimulus in one modality triggers a hallucination in the *same* modality (e.g., hearing voices only when the tap is running). * **Reflex Hallucination:** A stimulus in one modality triggers a hallucination in a *different* modality (e.g., hearing a sound triggers a visual hallucination). * **Autoscopic Hallucination:** Seeing a double of oneself in external space (phantom double). * **Extracampine Hallucination:** A hallucination that occurs outside the normal sensory field (e.g., seeing someone behind your back).

Question 155: Avoiding awareness of the pain of reality by negative sensory data is a characteristic of which of the following defense mechanisms?

A. Distortion
B. Denial (Correct Answer)
C. Displacement
D. Dissociation

Explanation: ### Explanation **Correct Option: B. Denial** Denial is a **narcissistic (Level I) defense mechanism** where an individual deals with emotional conflict or stressors by refusing to acknowledge painful aspects of external reality or subjective experience that are apparent to others. The phrase "negative sensory data" refers to the rejection of factual, observable information from the environment. By "blocking" this data, the ego protects itself from the anxiety or pain that the reality would otherwise cause. **Analysis of Incorrect Options:** * **A. Distortion:** This involves grossly reshaping external reality to suit inner needs (e.g., hallucinations or megalomaniacal delusions). Unlike denial, which ignores reality, distortion actively transforms it. * **C. Displacement:** This is a neurotic defense where an emotion or drive is transferred from one object to another, less threatening one (e.g., a resident yelled at by a consultant taking their anger out on a junior). * **D. Dissociation:** This involves a temporary, drastic modification of one’s character or sense of identity to avoid emotional distress (e.g., fugue states or amnesia). It is a "splitting off" of mental functions rather than a rejection of sensory data. **Clinical Pearls for NEET-PG:** * **Hierarchy of Defenses (Vaillant’s Classification):** * **Level I (Pathological):** Denial, Distortion, Projection. * **Level II (Immature):** Acting out, Regression, Schizoid fantasy. * **Level III (Neurotic):** Displacement, Intellectualization, Reaction Formation, Repression. * **Level IV (Mature):** Sublimation, Altruism, Suppression, Humor. * **Key Distinction:** **Repression** is an *internal* forgetting (unconscious), while **Denial** is an *external* rejection of reality. * **Common Clinical Scenario:** A patient diagnosed with terminal cancer who continues to make long-term travel plans as if they are healthy is using Denial.

Question 156: In a 75-year-old male patient, which diagnostic technique is most appropriate to differentiate delirium from dementia?

A. Evoked EEG
B. CT scan
C. PET scan
D. EEG (Correct Answer)

Explanation: **Explanation:** The differentiation between delirium and dementia is a classic high-yield topic in geriatric psychiatry. While both conditions involve cognitive impairment, their physiological underpinnings differ significantly. **Why EEG is the Correct Answer:** Electroencephalography (EEG) is the most useful tool for differentiation because it reflects the **neurophysiological activity** of the brain. * **Delirium:** Characterized by **generalized diffuse slowing** of background activity (theta and delta waves). This reflects the acute metabolic or systemic derangement affecting the brain. (Exception: Alcohol/Sedative withdrawal delirium, which shows low-voltage fast activity). * **Dementia:** In early to moderate stages (especially Alzheimer’s), the EEG is typically **normal** or shows only minimal changes. **Analysis of Incorrect Options:** * **A. Evoked EEG:** These are used to measure specific sensory pathways (visual, auditory) and are not diagnostic for global cognitive disturbances like delirium. * **B. CT Scan:** While useful to rule out structural causes (like a subdural hematoma or tumor), a CT scan cannot differentiate delirium from dementia, as many dementia patients show atrophy and many delirium patients have normal imaging. * **C. PET Scan:** Used primarily in research or to differentiate types of dementia (e.g., Frontotemporal vs. Alzheimer’s) by showing glucose metabolism patterns, but it is not a bedside tool for acute delirium. **NEET-PG High-Yield Pearls:** 1. **Core Difference:** Delirium is a disorder of **attention and consciousness** (fluctuating); Dementia is a disorder of **memory and cognition** (stable). 2. **Reversibility:** Delirium is usually reversible; Dementia is typically progressive and irreversible. 3. **Visual Hallucinations:** More common in Delirium (and Lewy Body Dementia) than in Alzheimer’s. 4. **Sundowning:** While seen in both, it is a hallmark of worsening orientation in the evening for these patients.

Question 157: An IQ score of 98 falls into which category of intelligence?

A. Below Average
B. Average (Correct Answer)
C. Above Average
D. Gifted

Explanation: **Explanation:** The Intelligence Quotient (IQ) is a standardized measure of cognitive ability, typically calculated using the formula: **(Mental Age / Chronological Age) × 100**. In modern psychometrics, IQ follows a normal distribution (Bell Curve) with a mean of 100 and a standard deviation (SD) of 15. **Why the correct answer is right:** An IQ score of **98** falls squarely within the **Average** range. According to the Wechsler classification, the "Average" category encompasses scores from **90 to 109**. Since 98 is near the mean of 100, it represents typical cognitive functioning. **Analysis of incorrect options:** * **Below Average (80–89):** Also termed "Low Average" or "Dull Normal." A score of 98 is too high for this category. * **Above Average (110–119):** Also termed "High Average." This category begins at 110. * **Gifted (130+):** This represents individuals scoring 2 standard deviations above the mean. It includes categories like "Very Superior." **Clinical Pearls for NEET-PG:** 1. **Intellectual Disability (ID):** Defined by an IQ **below 70** (2 SDs below the mean) along with deficits in adaptive functioning manifesting before age 18. 2. **ID Grading:** * Mild: 50–70 (Educable) * Moderate: 35–49 (Trainable) * Severe: 20–34 * Profound: <20 3. **Borderline Intelligence:** IQ scores between **70–79**; these individuals do not meet the criteria for ID but struggle with complex cognitive tasks. 4. **Flynn Effect:** The observed rise in average IQ scores over generations, necessitating periodic re-norming of tests.

Question 158: A young adult concludes that he is never going to be in a relationship after experiencing rejection for a date twice. This cognitive distortion is:

A. Personalization
B. All or none thinking
C. Overgeneralization (Correct Answer)
D. Selective abstraction

Explanation: **Explanation:** The correct answer is **Overgeneralization**. This cognitive distortion occurs when an individual draws a broad, sweeping conclusion based on a single event or a small number of isolated incidents. In this scenario, the patient takes two specific instances of rejection and applies them to his entire future ("never going to be in a relationship"), assuming a pattern of failure is inevitable. **Analysis of Options:** * **Overgeneralization (Correct):** The hallmark is using words like "always," "never," or "every" based on limited evidence. The patient generalizes a specific negative event to all future possibilities. * **Personalization:** This involves taking responsibility for events outside of one’s control or assuming that others' behaviors are a direct reaction to oneself (e.g., "The waiter is grumpy because I did something wrong"). * **All-or-None Thinking (Dichotomous Thinking):** This is viewing things in black-and-white categories with no middle ground. If a performance isn't perfect, it is a total failure. It differs from overgeneralization as it focuses on the *quality* of an event rather than the *frequency/pattern* of events. * **Selective Abstraction:** This involves focusing on a single negative detail while ignoring the larger, more positive context (e.g., focusing on one critical comment in a performance review that was otherwise glowing). **Clinical Pearls for NEET-PG:** * **Cognitive Distortions** are central to **Aaron Beck’s Cognitive Theory of Depression**. * They are the primary targets of **Cognitive Behavioral Therapy (CBT)**, where patients are taught to identify and "restructure" these irrational thoughts. * **High-Yield Distinction:** *Overgeneralization* looks at a single event as a "never-ending pattern of defeat," whereas *Catastrophizing* involves expecting the worst possible outcome in any situation.

Question 159: What is the average mental IQ according to Wechsler's Scale?

A. 70-79
B. 80-89
C. 90-109 (Correct Answer)
D. 110-119

Explanation: **Explanation:** The **Wechsler Intelligence Scales** (such as the WAIS for adults and WISC for children) are the most widely used instruments for assessing intelligence. Wechsler defined IQ based on a normal distribution curve (Bell Curve) with a **mean of 100** and a **standard deviation (SD) of 15**. 1. **Why Option C is Correct:** In a normal distribution, the majority of the population falls within the "Average" range. According to Wechsler’s classification, the range of **90–109** is designated as **Average Intelligence**. This range encompasses the mean (100) and accounts for approximately 50% of the general population. 2. **Analysis of Incorrect Options:** * **Option A (70–79):** This is classified as **Borderline Intellectual Functioning**. It is the zone between intellectual disability and low average intelligence. * **Option B (80–89):** This is classified as **Low Average** (formerly "Dull Normal"). * **Option D (110–119):** This is classified as **High Average** (formerly "Bright Normal"). **High-Yield Clinical Pearls for NEET-PG:** * **IQ Formula:** Mental Age (MA) / Chronological Age (CA) × 100. (Note: Wechsler used the Deviation IQ method rather than the ratio method). * **Intellectual Disability (ID):** Defined as an IQ **below 70** (more than 2 SDs below the mean) along with deficits in adaptive functioning. * **Classification of ID (ICD-10):** * Mild: 50–69 (Educable) * Moderate: 35–49 (Trainable) * Severe: 20–34 * Profound: < 20 * **Giftedness:** An IQ score of **130 or above** is classified as "Very Superior."

Question 160: Munchausen syndrome by proxy is best described as:

A. Factitious disorder imposed on another (Correct Answer)
B. Malingering
C. Hysteria
D. Conversion disorder

Explanation: **Explanation:** **Munchausen syndrome by proxy** is a severe form of **Factitious Disorder Imposed on Another (FDIA)**. In this condition, a caregiver (usually a mother) deliberately produces, feigns, or exaggerates physical or psychological symptoms in a person under their care (usually a child). The primary motivation is not external gain (like money), but rather the **internal psychological need** to assume the "sick role" by proxy and receive attention or sympathy from medical staff. **Analysis of Options:** * **Option A (Correct):** Under DSM-5 terminology, Munchausen syndrome by proxy is officially classified as **Factitious Disorder Imposed on Another**. The perpetrator receives the diagnosis, while the victim is assigned a diagnosis of abuse. * **Option B (Malingering):** Unlike factitious disorder, malingering involves the intentional production of symptoms for **secondary gain** (e.g., avoiding work, obtaining drugs, or financial compensation). * **Option C (Hysteria):** This is an archaic term formerly used to describe various neurotic and somatoform disorders; it is no longer a formal clinical diagnosis in modern psychiatry. * **Option D (Conversion Disorder):** Also known as Functional Neurological Symptom Disorder, this involves neurological symptoms (like paralysis or seizures) that are **unintentional** and not consciously produced by the patient. **High-Yield Clinical Pearls for NEET-PG:** * **The "Cure":** Symptoms in the victim typically disappear miraculously when the child is separated from the perpetrator (e.g., during hospitalization with restricted visitation). * **Perpetrator Profile:** Often has some medical knowledge or background and appears unusually calm or "helpful" during the child's crisis. * **Legal Status:** It is considered a form of **child abuse** and must be reported to child protective services immediately. * **Factitious Disorder Imposed on Self:** Formerly known as Munchausen Syndrome, where the individual induces symptoms on their own body.

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Clinical Interview Techniques

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Mental Status Examination

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Diagnostic Formulation

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Rating Scales and Questionnaires

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Psychological Testing

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Neuropsychological Assessment

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Risk Assessment

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Laboratory Investigations in Psychiatry

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Neuroimaging in Clinical Assessment

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Cultural Considerations in Assessment

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Developmental Assessment

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Diagnostic Classification Systems

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