Zach and Michelle:

Core conclusion: After hearing recovery, the amount of language input determines intellectual development.

Betty Hart and Todd Risley's experiments:

Long-term impact: Vocabulary gap is directly related to IQ, academic achievement and future income.

Core theory: Unused neuronal connections gradually degenerate (such as in the case of cataracts in children).

The golden period of language stimulation: Before the age of three, it is a key stage in the construction of language, mathematics and logic abilities.

The role of cortisol: Long-term stress leads to reduced brain connections and decreased cognitive ability (such as "faceless experiments").

The harm of lack of interaction: Indifference or imperative language aggravates children's anxiety and hinders learning ability.

Tune In (Emboyant Follow)

Key points of operation: Follow the child's attention and use "children to language" to describe behavior.

Case: The child touches the sheets → “This is the sheets, soft, right?”

Skill: Use repetitive words ("eat meals") to enhance the fun of interaction.

Talk More (full communication)

Parallel conversation: describe the current activity (such as "Mom is cutting carrots, and it's clattering").

Extended out of context: stimulate imagination (such as “Where will the puppy hide if it rains?”).

Language extension: Expand "Hug" to "Do you want your baby to hug him when he is tired?"

Take Turns (Talking in turn)

Open question: Alternative commands (such as "The stove is hot, what if you touch it?").

Cause and effect explanation: cultivate self-control (such as "toys can trip people up, can we organize them together?").

Disadvantage analysis: The lack of interactive feedback between TV and mobile phones hinders the development of language and emotional intelligence (such as children imitating animation violence without consequences).

Mathematical Ability: Daily dialogue incorporates the concepts of numbers and space (such as "buttons: first, second...").

Resolving gender bias: Girls have less exposure to mathematical vocabulary and can be eliminated through language intervention.

Growth thinking: Through process praise (such as “You practice hard, so you make progress”).

The value of free resources: Parental language can narrow the class gap more than school district housing.

Policy enlightenment: Early education should give priority to popularizing scientific parenting concepts rather than hardware investment.

Misunderstanding refutation: "Children who do not understand before the age of three" is a wrong perception, and early interaction determines lifelong potential.

"Lifelong Growth": Theoretical Deepening of Growth-based Thinking.

"The Essence of Poverty": The complex relationship between economic conditions and educational investment.

"Deliberate Practice": The scientific methodology for improving ability.