• In the 1930s, a bunch of German psychologists brought forward this rad idea called interactionism.
• Main dude: Kurt Lewin, a rockstar of 20th-century psychology.

B = f(PE)

• Translation: Behaviour is like making a burger. The taste (Behaviour) depends on the quality of meat (Person) and the toppings (Environment). Yum!

• It helps psychologists, including those super-fit exercise psychologists, to motivate folks to adopt healthier lifestyles.
• To truly understand someone, you can't just look at their personal choices or their environment; you have to see how the two interact. Like cheese and tomato in our burger!

• Our genes are like the recipe of who we are. But the environment is like the chef that adds a twist.
• Two cool concepts:
  • Emergenesis: Some personality traits need multiple genes to jam together. These traits won’t necessarily pass down in families, but identical twins? They’ll share them. Examples: Some types of mental illness, leadership qualities, or even genius levels!
  • Epigenesis: It’s all about how genes and environment dance together. It's like salsa dancing – it’s all about the chemistry between the dancers!