2011 VN'ers Psychology U3 Questions Thread

[totaled]

Sorryy I'm soooo lost and need a bit of help

You want to test short term memory capacity in preschool children, teenagers, and peoples aged over 65 years.
a) Define your population
b) How could you obtain a random sample from each of these populations?
[can we say something like lottery procedure? loool im so lost]

Give an example of an instruction to participants and one or more experimental procedures that would be considered to be non-standardised.

Suggest a way in which the following concepts could be operationalised: forgetting, anxiety, aggression, crowding, relaxation, stress

Explain why the following research study would be likely to have sample bias: A survey in binge-drinking behaviour in a popular teenage magazine

so many silly questions i know  But thanks in advance!

a) Preschool children, teenagers and people aged over 65, although it sounds a bit weird since people is probably inclusive of preschool children and teenagers, i'd still put that

b) A lottery method is fine (usually most common answer, which is good!)

Not sure about the next one

operationalisation:

forgetting = percentage of words that you are unable to recall after seeing a list for 30 seconds
anxiety = nervousness as measured by a Dr.Phil's Anxiety Test
Aggression = Number of offensive words said in the space of one hour
Crowding = Number of people per square metre
Relaxation = Level of Calmness operationalised by the score on a relaxation test
Stress = stress levels as operationalised by the score on the Victorian Stress Test

**Be creative about it, i have provided a numerous amount of ways you can present it, personally I like making up my own test, just so the examiners/markers know that you are doing your best to 'operationalise', or to state how you are measuring it

The teenagers that read popular teenage magazines does not reflect the population. By reading popular teenage magazines, they will be different in certain traits and behaviour, and the teens that do not read teenage magazines will not be able to be chosen for the survey. It is thus a sample bias


Hope it helped !

[Zafaraaaa]

thank you!!

[iNerd]

Another Q

Left hemisphere = right visual field = left half of each eye
Right hemisphere = left visual field = right half of each eye

But when info goes into the left eye doesn't it go to the right hemisphere because it's opposite? :S

[Slumdawg]

Another Q

Left hemisphere = right visual field = left half of each eye
Right hemisphere = left visual field = right half of each eye

But when info goes into the left eye doesn't it go to the right hemisphere because it's opposite? :S

You need to spilt the eye in half, straight down the middle. If you think about the visual fields, that is where it crosses over, left visual field is processed in the right occipital lobe and vice versa. However each eye receives information from both visual fields. So half of the information needs to go the same hemisphere as the eye, e.g. half of the info in the left eye will go to the left hemisphere while the other half of the information goes to the opposite hemisphere.

Just think of the cross over as being part of the visual fields, moreso than when the information actually reaches our eyes...

This diagram is simple and shows you exactly how it works, and where the crossover is: http://www.glyphic.com/free/fieldtester/theBrain.gif

[iNerd]

LisaChem 2009 Unit 3 exam.

They state that REM sleep has both beta and theta waves.

I thought it was beta only?

[iNerd]

Question 5
The amount of motor cortex devoted to particular body parts ________________, but
_____________________.
A. corresponds to their size, not to the importance of the bodily areas
B. corresponds to their size, not what each part does
C. corresponds to the importance of the bodily areas, not to their size
D. none of the above

I thought it was to do with the fineness and complexity of control not the importance of body parts? You could argue some parts are more important than the other...?

I put D - none of the above.

[Russ]

Important areas of the body have greater control etc. because of how important they are
eg, fingers need to be dexterous because they're important for survival, thus greater cortex area

[iNerd]

LisaChem 2009 Unit 3 exam.

They state that REM sleep has both beta and theta waves.

I thought it was beta only?

---------------------------------------------------------------------------------------------------------------
LisaChem 2010 Unit 3 Exam.

Question 16
Marc is sleeping. His EEG shows a pattern of high amplitude, low frequency waves. He is
immediately woken, and reports dreaming. Explain.

Um? Answer says NREM 4 due to the delta waves described but 'immediately woken'? NREM 4 is a stage of deep sleep and if people are woken they take up to 10 minutes to orientate themselves, are groggy and disorientated. Shouldn't the answer be REM sleep?

[Zafaraaaa]

Help pleasee

Q- Explain how the use of a sugar pill as a placebo in a control group can create a confounding variable in experimental research.
[i know the sugar pill causes demand characteristics, but how does this affect the control group?] :/

[iNerd]

Help pleasee

Q- Explain how the use of a sugar pill as a placebo in a control group can create a confounding variable in experimental research.
[i know the sugar pill causes demand characteristics, but how does this affect the control group?] :/

Placebo effect where the participants think that the sugar pill is them receiving some kind of experimental treatment and they respond in accordance with this belief producing a CV which means the control group can't be used as a basis for comparison to isolate the effect of the IV as it isn't a normal control group due to the demand characteristic created...(I think)...

EDIT: Still need my 2 Qs above answered!

[Glockmeister]

LisaChem 2010 Unit 3 Exam.

Question 16
Marc is sleeping. His EEG shows a pattern of high amplitude, low frequency waves. He is
immediately woken, and reports dreaming. Explain.

Um? Answer says NREM 4 due to the delta waves described but 'immediately woken'? NREM 4 is a stage of deep sleep and if people are woken they take up to 10 minutes to orientate themselves, are groggy and disorientated. Shouldn't the answer be REM sleep?

I bolded the important bit. It's important to realise that it is possible to experience the sensation known as dreaming at NREM 4. It can't be REM sleep because the high amplitude, low frequency waves on the EEG is uncharacteristic of REM sleep. Remember, it is possible to say things even if you're groggy and disorientated - just ask me when I get woken up after a dream.

[Glockmeister]

Question 5
The amount of motor cortex devoted to particular body parts ________________, but
_____________________.
A. corresponds to their size, not to the importance of the bodily areas
B. corresponds to their size, not what each part does
C. corresponds to the importance of the bodily areas, not to their size
D. none of the above

I thought it was to do with the fineness and complexity of control not the importance of body parts? You could argue some parts are more important than the other...?

I put D - none of the above.

Actually, I'd like to know where that question came from - I think that question's crap to be honest.

For example, your legs are critical for survival, but there's not a lot of cortex devoted to it, compared to say toes or fingers.

[Slumdawg]

LisaChem 2009 Unit 3 exam.

They state that REM sleep has both beta and theta waves.

Lisachem = zero reputability. I'd actually recommend staying away from them because they're THAT bad at psych...

With REM sleep I'd say it's mainly comprised of beta waves although there is always gonna be a little bit of other waves, but I'd say that little percentage of non-beta waves would be alpha because they're the most similar to beta waves instead of what lisachem suggests - theta. This is from several sources not just my own belief. REM = mostly beta but some small amounts of alpha waves as well.

[iNerd]

Actually, I'd like to know where that question came from - I think that question's crap to be honest.

For example, your legs are critical for survival, but there's not a lot of cortex devoted to it, compared to say toes or fingers.

That was my reasoning. LisaChem exam (forgot which year...)

[Slumdawg]

Well I think the question does make sense but it's kinda worded poorly. Russ' explanation is a good one.

Do you need that much precise and fine movement with your legs? Probably not, so it's not as important. I think it's referring to the importance of those areas to have enough motor cortex, hence the importance of them to be able to carry out fine and intricate movements. I think you're stuck thinking on the importance of those areas for survival instead of the importance of them actually having precise movement. Something like your tongue and fingers needs to be able to carry out fine movements otherwise it'd affect your ability to speak or write, while your legs movements don't need to be so precise so their need to have heaps of motor cortex isn't as great. Personally, I reckon there is logic behind what it's saying but it should have been worded better.