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Herb

Unit 2 - Biological Approach To Behaviour

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Magnifying Glass Tilted Left

Unit 1 - Research Methodology

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Brain

Unit 3 - Cognitive Approach To Behaviour

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Globe Showing Europe Africa

Unit 4 - Sociocultural Approach To Behaviour

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Performing Arts

Unit 6 - Health psychology

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Busts In Silhouette

Unit 7 - Pyschology Of Human Relationships

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Chart Increasing

Unit 8 - Developmental psychology

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Bar-Chart

Unit 9 - Internal Assessment

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Light Bulb

Unit 10 - The IB Curriculum - A Conceptual Model

🧠 Understanding IQ &amp; Genetics with Twins! Let&#39;s break down this study to understand it better, shall we?

<ul>
	<li>
	MZ twins (Monozygotic Twins): They come from the SAME egg and share 💯% of their genes.

	For example, imagine two identical blue marbles.
	</li>
	<li>
	DZ twins (Dizygotic Twins): They come from DIFFERENT eggs. They share 50% of their genes, just like any siblings or parents with their biological children.

	Think of one blue marble and one red marble.
	</li>
	<li>
	Adopted Parents &amp; Kids: They don&#39;t share any genes.

	Imagine a blue marble and a yellow marble.
	</li>
</ul>

<ul>
	<li>MZ twins would have the exact same IQ! (Perfect correlation of 1)</li>
	<li>DZ twins, siblings, and parents &amp; biological children would have similar but not identical IQs.</li>
	<li>Adopting parents &amp; children? Well, their IQs wouldn&#39;t relate at all!</li>
</ul>

But hey, it&#39;s not just genes; environment plays a role too!

<ul>
	<li>MZ twins raised together in the same environment will have more similar IQs than those raised apart.</li>
</ul>

Imagine if both blue marbles grew up in a box full of glitter. They&#39;d both get super sparkly!

<ul>
	<li>
	Even MZ twins raised together don&#39;t have identical IQs. This means individual experiences shape IQ too.

	Maybe one blue marble went on a mini adventure and learned something new!
	</li>
	<li>
	They found an effect size of 0.85 in their correlations. (It&#39;s big! If you&#39;re curious about correlation coefficients, consider it as a revisit homework. 😉)

	It&rsquo;s like saying, if one twin loves chocolate ice-cream, there&#39;s an 85% chance the other does too.
	</li>
	<li>
	Using fancy math (Falconer&rsquo;s formula), they concluded that 54% of intelligence is inherited.

	So, if IQ was a pizza, more than half of it would be from the genes!
	</li>
</ul>

<ul>
	<li>
	Not all MZ twins are separated right after birth; some might grow up together a bit.

	Like two blue marbles rolling together for a while before taking separate paths.
	</li>
	<li>
	Environment factors: Twins might grow up in similar cultural environments.

	It&#39;s like both marbles rolling through the same garden, even if they&#39;re not together.
	</li>
	<li>
	Prenatal environment: MZ twins share more similar conditions before birth than DZ twins.

	Think of it as both marbles being crafted by the same artist.
	</li>
	<li>
	Sample size: Twin studies usually have fewer participants, so replicating results can be tricky.

	Imagine trying to find a pair of rare, glowing marbles in a huge bag. Not easy, right?
	</li>
	<li>
	Generalization: Twins might not represent everyone, so what applies to them might not apply to all.

	Like saying all marbles like rolling downhill when it&#39;s really just the twin marbles.
	</li>
	<li>
	Physical similarities: Twins look alike! This might make the environment treat them similarly.

	Imagine if all marbles that glowed in the dark got special treatment in the marble world.
	</li>
</ul>

Intelligence is 54% inherited (according to this study). But remember, genes aren&#39;t the sole players; individual experiences and the environment have their parts too! And as cool as twin studies are, they come with their set of limitations. So, always sprinkle a pinch of caution when interpreting their results! 😉

Unraveling IQ: Twins, Genetics & Bouchard's Insights!

ib-standard-level.webp

Standard Level

Psychology SL

Unit 2 - Biological Approach To Behaviour

Unraveling IQ: Twins, Genetics & Bouchard's Insights!

Table of content

The twin types & genetics! 🧬

If only genes decided iQ 🧠📏

The role of environment 🏡

Unlock the Full Content!

Unit 2 - Biological Approach To Behaviour

Unraveling IQ: Twins, Genetics & Bouchard's Insights!

Table of content

The twin types & genetics! 🧬

If only genes decided iQ 🧠📏

The role of environment 🏡

Unlock the Full Content!