3.3. Theories of Attention

● Broadbent’s Filter Model (1958) suggests that attention works like a filter that allows only certain information to pass through for further processing. ● According to this model, unattended information is blocked or ignored, and only relevant information is processed.

Broadbent’s Filter Model, proposed in 1958, explains how our attention functions like a filter. Imagine you are at a party where many conversations are happening. Your attention acts as a filter, allowing you to concentrate on one conversation while blocking out the others. This means that information from conversations that you are not attending to gets ignored or blocked entirely, ensuring your cognitive resources are focused on the information that matters to you.

Think of a coffee filter. When you pour coffee grounds into the filter, only the liquid coffee passes through while the grounds are left behind. Similarly, our attention filters out irrelevant information so we can focus on what’s important.

● Treisman’s Attenuation Theory (1964) modifies Broadbent's theory by suggesting that unattended information is not completely blocked but rather "attenuated" (weakened). ● This means that we can still process some of the unattended information, but it is less focused or weaker in comparison to the attended stimuli.

Treisman’s Attenuation Theory, proposed in 1964, builds upon Broadbent's ideas by stating that unattended information is not entirely blocked out but rather weakened or 'attenuated.' This means that while we may not be actively focusing on certain stimuli, our brain is still receiving some level of information from them. For instance, during the same party, you may not be participating in nearby conversations, but you might still hear snippets or catch certain words, indicating that your brain is still somewhat aware of those sounds even if they are not your primary focus.

Imagine you are watching a movie with subtitles and listening to the dialogues loudly. If someone else in the room talks softly, you might not catch every word they say, but you could still hear them enough to know they are speaking. This is similar to how we can process certain unattended stimuli to a lesser extent.

● Deutsch and Deutsch’s Late Selection Theory (1963) posits that all stimuli are processed at a deep level, but only the most relevant information is selected for further action. ● This theory suggests that attention occurs after the stimuli have been fully analyzed.

The Late Selection Theory, introduced by Deutsch and Deutsch in 1963, asserts that all incoming stimuli are processed thoroughly, but only the most pertinent information is chosen for action. In a way, it suggests that our cognitive system evaluates everything at a deep level before making a decision on what deserves attention. For example, when you receive a comprehensive email, your brain might process all the details initially, but you naturally focus on the urgent points while setting aside the less critical information.

Consider watching a cooking show where the chef explains various recipes. Your brain processes everything they say—ingredients, techniques, tips—first. However, you only note down the recipe you find most exciting. This is akin to how attention works, as your brain initially takes in everything before selecting what to prioritise.

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