On Perception

Look at the images below. Which image do you see first in each of four images in the gallery below? (To help, there is a question below each image.)

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Look at them again. Can you see the other?

Perception: The recognition and interpretation of sensory information mainly on memory

Perception: The nerve processes of recognition and interpretation

Perception: The insight, intuition, or knowledge gained by perceiving

Perception: The capacity for such insight

Watch the video below.

As humans we encounter many things each day as our senses are constantly processing data. For example, the bottom of our feet can simultaneously distinguish contact with a sock, the inside of the shoe, the surface on which one is standing or moving.

Our senses allow us to experience the world around us. Take a moment to think of all the things you perceive on a daily basis.

Perception is about our sensory experience of the world around us and involves both the recognition of environmental stimuli and actions in response to these stimuli.

Perceptions include the organization, identification and interpretation of sensory information in order to represent and understand the environment.

What the short video below.

All perception involves signals in the nervous system, which in turn result from physical stimulation of the sense organs.

Perception depends on complex functions of the nervous system, but subjectively seems mostly effortless because this processing happens outside conscious awareness.

Perception is influenced by past experiences, the situation, the expectation, and the intensity of the perception.

Watch the last video for the final test.

What do you think?

On a Tribute to the Cosmos Giant

Image from the Center for Inquiry

Image from the Center for Inquiry

Friday afternoon I stumbled across an interesting tidbit – that is, this weekend is Carl Sagan Day – marked by the his birthday (November 9) – thus, this unplanned post.

We can put many tags on Dr. Sagan – take your pick – scientist, astronomer, author, philosopher, cosmologist, astrophysicist, professor, television personality, and others. To me, and no matter the role, there are two facts that stand above others: he was a tireless promoter of science, plus he stood in awe of universe.

The article that sparked this post was this small collection of his inspirational quotes. To celebrate this day, I’ve taken two of the quotes from the article, plus two others, and then supported them in my style of adding videos … or maybe I simply needed an excuse to display one of my all-time favorites.

Enjoy … which was your favorite? Do you know my favorite?

I am a collection of water, calcium and organic molecules called Carl Sagan. You are a collection of almost identical molecules with a different collective label. But is that all? Is there nothing in here but molecules? Some people find this idea somehow demeaning to human dignity. For myself, I find it elevating that our universe permits the evolution of molecular machines as intricate and subtle as we.

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What distinguishes our species is thought. The cerebral cortex is in a way a liberation. We need no longer be trapped in the genetically inherited behavior patterns of lizards and baboons: territoriality and aggression and dominance hierarchies. We are each of us largely responsible for what gets put in to our brains. For what as adults we wind up caring for and knowing about. No longer at the mercy of the reptile brain, we can change ourselves. Think of the possibilities.

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A blade of grass is a commonplace on Earth; it would be a miracle on Mars. Our descendants on Mars will know the value of a patch of green. And if a blade of grass is priceless, what is the value of a human being?

Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.