You're walking home after dark. A shape lunges from behind a parked car. Before you've consciously decided anything, your heart is hammering, your pupils are wide, your palms are damp, and your legs are already moving. Then the "attacker" turns out to be a plastic bag in the wind — and it takes a full minute for your body to stand down.
That minute is the point. Your stress system fired in a fraction of a second, but it can't switch off nearly as fast. It evolved to handle short, sharp threats — a predator, a rival — and then reset. The problem is that your modern threats (a looming deadline, a tense group chat, a college decision) don't lunge and leave. They linger for weeks. And a system built for sprints gets run like a marathon.
This lesson is about what happens when YOUR stress response stays switched on too long — how it wears down the body, how you cope (well or badly), and where the line falls between ordinary distress and a psychological disorder.
In everyday speech "stress" is the bad feeling. In psychology it's more precise. A stressor is the event or situation that triggers a response (the exam, the breakup). Stress is the process by which you appraise and respond to that stressor. So stress isn't out there in the world and it isn't purely inside your head — it's the relationship between the two.
That relationship is the key insight of Richard Lazarus's appraisal model. Lazarus argued that an event becomes stressful only after you interpret it. Primary appraisal asks: Is this a threat to me? Secondary appraisal asks: Can I handle it — do I have the resources to cope? The same pop quiz is a minor blip to a prepared student (low threat, high coping) and a catastrophe to an unprepared one (high threat, low coping). Same stressor, different stress, because appraisal sits in between. This is why telling someone to "just relax" rarely works — you'd have to change their appraisal, not the event.
When you appraise a threat, your body responds along two tracks.
The fast track is the sympathetic nervous system (SNS), the branch of your autonomic nervous system that triggers fight-or-flight. It tells your adrenal glands to dump epinephrine (adrenaline) into the blood within seconds — heart rate up, breathing up, energy mobilized. This is the lunging-bag response.
The slow track is the HPA axis (hypothalamus → pituitary → adrenal cortex). The hypothalamus signals the pituitary, which signals the adrenal cortex to release cortisol, the main stress hormone. Cortisol keeps energy available and dampens nonessential systems — useful in a crisis, costly if it never shuts off. Chronically elevated cortisol is the villain in most stress-and-health stories.
Try This. Right now, take your pulse for fifteen seconds. Then vividly imagine giving a speech to a packed auditorium in five minutes — picture the faces, the silence. Take your pulse again. If it ticked up, you just watched an appraised threat (no real auditorium exists) recruit your SNS. The thought was the stressor.
Hans Selye stressed lab rats in every way he could think of and noticed they all responded with the same three-stage physiological pattern, regardless of the specific stressor. He called it the General Adaptation Syndrome (GAS) — "general" because the response is nonspecific.
Order matters for the exam: alarm → resistance → exhaustion. The trap is thinking "resistance" means the stressor is winning; it means you are resisting — holding the line at a cost.
GAS exhaustion isn't just a metaphor. Chronic stress and sustained cortisol suppress the immune system, leaving you more vulnerable to infection and slowing wound healing. Stress doesn't create a cold virus, but it weakens the defense that would have fought it off.
A whole class of conditions — psychophysiological illnesses (older term: "psychosomatic") — are real, physical illnesses (high blood pressure, some headaches, ulcer-related issues) in which stress plays a causal role. "Psychophysiological" does not mean imaginary; the tissue damage is genuine. The mind influences the body through real biological pathways.
Cardiologists Friedman and Rosenman described a personality pattern linked to heart disease. The Type A personality is competitive, hard-driving, impatient, and — the toxic ingredient — frequently hostile and angry. The Type B personality is easygoing and relaxed. Their research linked Type A reactivity (especially the anger/hostility component) to higher rates of coronary heart disease. The nuance modern researchers add: it's mainly the hostility, not the ambition, that does the damage.
Coping is how you reduce, tolerate, or manage stress. The master distinction:
Neither is "better" in the abstract; the skill is matching the strategy to the situation. The classic error is using emotion-focused coping (distracting yourself, venting) on a problem you could actually solve.
Three factors reliably buffer stress:
Psychologist Shelley Taylor challenged the assumption that "fight-or-flight" is the whole story. She proposed the tend-and-befriend response: under stress, people (and her research emphasized this pattern is especially common in women) often respond by nurturing those around them (tend) and seeking social contact (befriend) rather than fighting or fleeing. The hormone oxytocin, released under stress, supports this affiliative response.
Health psychology studies how psychological factors affect health, illness, and recovery — the applied home of everything above. It overlaps with the biopsychosocial model from Lesson 1: health emerges from biological, psychological, and social factors interacting. The takeaway isn't "stress is bad," it's that how you appraise, cope, and connect measurably shapes your physical health.
Now the pivot. When does ordinary distress become a psychological disorder? Psychologists look for a combination of the three D's:
A useful modern phrasing folds these into maladaptive behavior that causes distress or impairs functioning. No single D is sufficient; clinicians weigh the pattern, and always against cultural context — a behavior that's disordered in one setting may be normal in another.
The standard reference for diagnosis is the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th edition), published by the American Psychiatric Association. It's the classification system — it lists disorders and their diagnostic criteria so clinicians use a shared language. (The DSM describes and classifies; it does not, by itself, explain causes.)
Two framing models compete and combine. The medical model treats psychological disorders like physical illnesses — with diagnosable causes, symptoms, and treatments — which usefully reduced cruelty toward sufferers but can over-bias toward purely biological explanation. The broader biopsychosocial model insists most disorders arise from biological, psychological, and sociocultural factors together. The exam rewards the biopsychosocial framing.
Diagnostic labels help clinicians communicate — but they carry risk. A label can become a lens that distorts how everything a person does is interpreted, and it can stigmatize. Once you "know" someone is diagnosed, their ordinary behaviors start looking like symptoms. Hold that thought for the Spotlight.
Anxiety disorders share excessive, persistent fear or anxiety that is out of proportion to actual threat and impairs functioning:
Two disorders that involve anxiety but the DSM-5 places in their own categories (a favorite exam point):
Keep these respectful in your head: these are common, treatable conditions, not character flaws.
Rosenhan (1973) — "On Being Sane in Insane Places."
Who & when: Psychologist David Rosenhan, 1973.
Method: Rosenhan and seven other healthy "pseudopatients" presented themselves at psychiatric hospitals, each reporting a single symptom — hearing a voice say words like "empty," "hollow," "thud." Beyond that one fabricated complaint, they gave true life histories and behaved completely normally. Once admitted, they reported the voices had stopped and acted as they ordinarily would.
Findings: All but one were admitted, most diagnosed with schizophrenia, and they stayed an average of 19 days (range up to 52). Not one was detected by staff as an impostor. Crucially, once the label was attached, normal behavior was reinterpreted to fit it: note-taking was recorded as "writing behavior," and ordinary boredom as pathology. When discharged, they were labeled schizophrenia "in remission" — never simply healthy. Ironically, other patients often suspected the pseudopatients were faking.
Significance: Rosenhan exposed the power of diagnostic labels and context — that a label, once applied, shapes how all subsequent behavior is interpreted, and that the "sane" and "insane" can be hard to tell apart in an institutional setting. The study fueled reform of diagnostic practice and remains the AP exemplar for the dangers of labeling. (Modern critics question some of Rosenhan's reporting, but its conceptual lesson about labeling endures.)
Scenario 1. Maria has a major scholarship interview in two weeks. She's anxious, so she builds a study schedule, drafts answers to likely questions, and runs mock interviews with a teacher. Her friend Jamal has the same interview but instead spends the two weeks venting to friends and watching shows to take his mind off it.
Name each coping strategy and evaluate the match. Maria is using problem-focused coping — she's acting on the stressor itself (preparation she can control), which is the appropriate match because the outcome is within her influence. Jamal is using emotion-focused coping, managing his feelings rather than the situation. Since the interview is highly controllable through preparation, Jamal's emotion-focused approach is a mismatch — the better move is problem-focused. (Emotion-focused coping would be the right tool for a stressor he genuinely couldn't change.)
Scenario 2. Over a brutal six-week stretch of finals, Devin notices he's catching every cold going around the dorm, sleeping badly, and feeling wired. By week six he's run-down and gets sick enough to miss an exam.
Explain using GAS and the immune system. Devin moved through Selye's General Adaptation Syndrome: the alarm spike at the start of finals, a prolonged resistance phase of sustained high arousal and elevated cortisol through the weeks, and finally exhaustion, where depleted reserves and cortisol-driven immune suppression left him vulnerable to the infections circulating around him. The stress didn't invent the viruses; it lowered his defenses against them.
Scenario 3. A new patient at a clinic is diagnosed with bipolar disorder. Over the following weeks, staff increasingly describe her completely ordinary behaviors — asking for a second blanket, declining to join an activity — as "symptoms," reading meaning into actions they'd ignore in anyone else.
Which study and concept explains this? This is the labeling effect demonstrated by Rosenhan (1973): once a diagnostic label is attached, it functions as an interpretive lens, and normal behavior gets reframed to confirm the label — the same dynamic by which Rosenhan's pseudopatients' note-taking became "writing behavior."
The GAS stages, in order. Students flip resistance and exhaustion or think "resistance = the stressor resisting." Order is Alarm → Resistance → Exhaustion (A-R-E). Resistance means you are resisting — fighting the stressor at a cost — not that you're losing. Exhaustion is when the bill comes due. Mnemonic: you sound the Alarm, you put up Resistance, then you reach Exhaustion.
Problem-focused vs. emotion-focused coping. The discriminator is what you act on. Problem-focused changes the stressor (fix the situation); emotion-focused manages your reaction (handle the feelings). Match to control: controllable → problem-focused; uncontrollable → emotion-focused. If the scenario shows someone doing something about the situation, it's problem-focused, even if it makes them feel better too.
The three D's of abnormality. Deviance, Distress, Dysfunction — and no single one is sufficient. Being deviant (unusual) isn't being disordered; lots of distress is normal in a hard week; and you always judge against cultural context. The test wants the combination plus maladaptiveness, not one box checked.
Anxiety disorder vs. OCD vs. PTSD. All three involve anxiety, but the DSM-5 separates them. Anxiety disorders (GAD, panic, phobias, agoraphobia) center on fear/worry itself. OCD is its own category — defined by obsessions + compulsions, not free-floating worry. PTSD is a trauma-and-stressor-related disorder — it requires a traumatic event as the trigger. If a question hinges on a triggering trauma → PTSD; on rituals that relieve intrusive thoughts → OCD; on worry/fear with no ritual and no specific trauma → an anxiety disorder.
Four-choice MCQs in current AP format. Answers and explanations in section (h).
EBQ format: you are given a question and three summarized peer-reviewed sources on a shared topic. Write a response that (1) makes a defensible claim, (2) supports it with evidence from at least two sources, and (3) provides reasoning that explains how the evidence supports the claim using course content. 7 points total: Claim (1) + Evidence (3) + Reasoning (2).
Question: Using the sources below, develop an argument about whether social support improves physical health outcomes under stress.
Source 1 (Cohen et al. — common-cold paradigm). Healthy adult volunteers reported the number and diversity of their social ties, then were intentionally exposed to a common-cold virus under controlled, quarantined conditions and monitored for infection. Participants with more diverse social networks were less likely to develop a clinical cold after exposure. The relationship held after statistically controlling for baseline immunity, age, and health behaviors. The authors concluded that social integration is associated with greater resistance to infection.
Source 2 (post-surgical recovery cohort). Researchers followed patients recovering from major cardiac surgery. Patients were grouped by self-reported social support. Higher-support patients had shorter average hospital stays (mean 5.8 days vs. 9.1 days for the lowest-support group), reported less pain, and showed lower circulating cortisol at follow-up. The correlational design means support was measured, not manipulated, so the authors cautioned that unmeasured factors (such as overall health) could contribute.
Source 3 (laboratory stress task). Participants completed a stressful public-speaking and arithmetic task either alone, in the presence of a supportive friend, or in the presence of a neutral stranger. Those who performed the task with a supportive friend present showed smaller increases in blood pressure and lower measured cortisol than those who were alone or with a stranger. The experimental manipulation (random assignment to support condition) allows a stronger causal interpretation.
Claim. Taken together, the sources support the claim that social support improves physical health outcomes under stress, both by buffering the body's physiological stress response and by predicting better resistance to illness and faster recovery. (Claim — 1 pt)
Evidence + Reasoning. Source 3 provides the strongest causal support: because participants were randomly assigned to complete a stressful task alone, with a stranger, or with a supportive friend, and the supportive-friend group showed smaller blood-pressure increases and lower cortisol, the experimental design lets us infer that the presence of support causes a dampened physiological stress response. (Evidence — Source 3) This connects directly to course content: cortisol is the key HPA-axis stress hormone, and chronically elevated cortisol contributes to immune suppression and psychophysiological illness, so lowering the cortisol response is a concrete biological pathway by which support protects health. (Reasoning — applies HPA axis / cortisol)
Source 1 extends this to a real health outcome: participants with more diverse social networks were less likely to develop a cold after controlled viral exposure, even after controlling for baseline immunity. (Evidence — Source 1) This fits the principle that chronic stress suppresses the immune system; if social support reduces the stress response (as Source 3 shows), it would plausibly leave the immune system better able to resist infection — exactly the pattern Source 1 reports. (Reasoning — links sources via immune function)
Source 2 adds a recovery outcome: higher-support cardiac patients had shorter hospital stays and lower cortisol. (Evidence — Source 2) Because Sources 1 and 2 are correlational, they cannot alone establish causation — but combined with the experimental evidence of Source 3, they show the same direction across infection, recovery, and lab-stress measures, strengthening the overall argument that social support is a genuine stress buffer that benefits physical health. (Reasoning — integrates research-design quality across sources) (Evidence from 3 sources — 3 pts; Reasoning with course application and source integration — 2 pts)
1. (B). Lazarus's model makes appraisal — interpreting the threat (primary) and one's coping resources (secondary) — the determinant of stress. (A) ignores appraisal; (C) and (D) are downstream physiological responses, not the cause of whether something is appraised as stressful.
2. (C). Selye's GAS runs Alarm → Resistance → Exhaustion. All other orderings scramble the sequence.
3. (C) Cortisol. Cortisol is released by the adrenal cortex via the HPA axis and sustains the slower stress response. (A) epinephrine drives the fast SNS response; (B) and (D) are neurotransmitters not central to the HPA stress cascade.
4. (B) Problem-focused coping. She acts on the stressor itself (a controllable situation). (A) emotion-focused would manage feelings instead; (C) is an affiliative stress response; (D) is a GAS stage, not a coping strategy.
5. (B) Hostility and anger. Modern analyses of Friedman and Rosenman's Type A work pinpoint the hostility/anger component as the strongest coronary-risk factor. (A) and (D) are Type A traits but not the toxic ingredient; (C) describes Type B.
6. (C) Agoraphobia. Fear of situations where escape/help may be unavailable (crowds, open spaces) defines agoraphobia. (A) is free-floating worry; (B) is fear of a specific object; (D) involves obsessions and compulsions.
7. (B). Intrusive thoughts (obsessions) plus repetitive washing to relieve anxiety (compulsions) define OCD, which the DSM-5 classifies separately from anxiety disorders. (A) mislabels it a phobia; (C) and (D) lack the obsession–compulsion pattern.
8. (B). Psychophysiological illness involves genuine physical changes in which stress plays a causal role — real, not imagined. (A) describes faking/malingering; (C) and (D) misstate the concept.
9. (C) PTSD. Symptoms following a traumatic event — flashbacks, nightmares, hyperarousal — define PTSD, a trauma- and stressor-related disorder in the DSM-5. (A), (B), and (D) lack the defining traumatic trigger.
10. (B). The team with more say (control) reporting fewer stress complaints illustrates that perceived control buffers stress. (A) involves affiliation; (C) is a coping style not shown here; (D) is unrelated to the scenario.
11. (B). Reinterpreting ordinary note-taking as a "symptom" shows a diagnostic label shaping interpretation of behavior — Rosenhan's central finding. (A) contradicts the study (they were healthy); (C) and (D) are not what the example demonstrates.
12. (B). A harmless, norm-respecting, non-distressing unusual hobby shows that deviance (unusualness) alone isn't disorder — distress and dysfunction are absent. (A) shows dysfunction, (C) distress and dysfunction, (D) is about diagnosis, not the deviance point.
13. (B). A stress-timed spike in infection rate points to stress-induced immune suppression raising vulnerability. (A) is illogical (exams don't transmit viruses); (C) is dismissive and unsupported; (D) contradicts the data pattern.
14. (B). Discharge time falls as support rises (9.1 → 7.4 → 5.8 days), so greater social support is associated with faster recovery. (A) and (D) contradict the trend; (C) ignores the support variable the data track.
15. (B). Taylor's tend-and-befriend model proposes nurturing and seeking social contact as a stress response, broadening the older fight-or-flight-only view. (A) and (D) are the views she challenged; (C) is false.
16. (B). The course treats the biopsychosocial model — integrating biological, psychological, and sociocultural factors — as the most complete framing. (A) is too narrow, (C) is one insufficient criterion, (D) describes classification, not explanation.
EBQ rubric (7 points):
- Claim (0–1): 1 pt for a defensible claim stating a clear direction (social support improves health outcomes under stress). No point for merely restating the prompt.
- Evidence (0–3): Up to 3 pts for accurate evidence drawn from the sources; at least two sources must be used for full credit. Each accurately represented source supports the point total; misrepresenting a source's design or findings forfeits that evidence.
- Reasoning & Application (0–2): Up to 2 pts for explaining how the evidence supports the claim using course content (cortisol/HPA axis, immune suppression, stress-buffering) and for addressing how research design (experimental vs. correlational) affects the strength of the causal argument.
PsyIQ · Lesson 27 of 30 · Unit 5: Mental and Physical Health. FRQ practice this lesson is an Evidence-Based Question (EBQ) — 3 sources, Claim + Evidence + Reasoning, modeled on the redesigned (2025+) AP Psychology exam. Not affiliated with the College Board. AP is a registered trademark of the College Board. Content pending external psychology QC.