Comparison Lab
Learn what separates closely related presentations and which evidence matters most.
Major Depressive Disorder vs Persistent Depressive Disorder (Dysthymia)
Both involve depressed mood and related symptoms, but MDD centers on a discrete episode while PDD centers on a chronic, lower-grade baseline that has become the person's "normal."
CompareMajor Depressive Disorder vs Bipolar I Disorder
MDD is defined purely by depressive episodes; Bipolar I is defined by the presence of at least one manic episode, regardless of whether depressive episodes ever occur.
CompareGeneralized Anxiety Disorder vs Panic Disorder
GAD is a diffuse, ongoing pattern of worry across many life domains; Panic Disorder centers on discrete, sudden panic attacks and the fear/avoidance that follows them.
CompareAutism Spectrum Disorder vs Attention-Deficit/Hyperactivity Disorder (ADHD)
ASD centers on social-communication differences plus restricted/repetitive patterns; ADHD centers on inattention and/or hyperactivity-impulsivity without a core social-communication deficit.
CompareBipolar I Disorder vs Schizophrenia
Bipolar I is a mood disorder in which psychotic-like features, if present, occur only during mood episodes; schizophrenia is a primary psychotic disorder in which delusions/hallucinations/disorganization persist independent of mood state.
CompareObsessive-Compulsive Disorder vs Schizophrenia
OCD involves intrusive thoughts the person usually recognizes as excessive or their own (even if unwanted); schizophrenia can involve delusions held with fixed conviction as external reality, without that same insight.
CompareBipolar II Disorder vs Major Depressive Disorder
The decisive issue is lifetime hypomania; depressive symptoms alone do not distinguish them.
CompareSocial Anxiety Disorder vs Generalized Anxiety Disorder
Social anxiety is organized around evaluation in social situations; GAD involves broad difficult-to-control worry across domains.
CompareAcute Stress Disorder vs Posttraumatic Stress Disorder
The temporal window after trauma is central to the distinction.
CompareIllness Anxiety Disorder vs Generalized Anxiety Disorder
Health-focused preoccupation is more central in illness anxiety; GAD is broader.
CompareBinge-Eating Disorder vs Anorexia Nervosa
The central contrast involves binge/loss-of-control eating versus restriction and weight/shape psychopathology.
CompareDissociative Identity Disorder vs Schizophrenia
Identity/memory discontinuity is conceptually different from psychosis, although presentations can be complex.
CompareSpecific Learning Disorder vs Attention-Deficit/Hyperactivity Disorder (ADHD)
Academic difficulty can occur in both, but the pattern of impairment and underlying mechanism differ.
CompareSocial (Pragmatic) Communication Disorder vs Autism Spectrum Disorder
The presence of restricted/repetitive behaviors and interests is a key differentiator.
CompareCyclothymic Disorder vs Bipolar II Disorder
Cyclothymic disorder is chronic subthreshold fluctuation; Bipolar II includes qualifying hypomanic and major depressive episodes.
CompareSchizoaffective Disorder vs Schizophrenia
The longitudinal presence and role of major mood episodes distinguishes the formulations.