📌 *Bias*(systematic error) 🗝️ points *Selection Bias & Recall Bias - case control* *Berksonian bias - (Hospital patient data)* *Attrition bias - cohort(loss to follow up)* *Hawthorne bias - cohort ( attention - so changes habit)* *Pygmalion bias - (Researcher believes)* *Neyman/survival bias - Incidence Prevalence bias* 🎯 *Must Know PYQ NEET 2025* 🎯 *Flashcards* # *NEETPG* *#fmge* 💡 Join & share for more👇👇👇 https://whatsapp.com/channel/0029VakVlKo4dTnGpR9tfL0k