Using your readings, podcasts, and independent research as needed... Please define scientific reliability and validity. Discuss whether in your opinion some conceptual construct or an evaluation tool

OK Following on from the previous. Short podcast This is another one looking at scales for depression so another famous scale that's used for measuring depression has been for a long time Hamilton depression rating scale factors for one so. Yes it uses. To evaluate. And to depression medications still. So let's take a look at this article this is this is another article. That has a good foundation study in this case of the Hamilton scale. So. Again your. Introduction here. Around one has been the gold standard for the assessment of depression for 2 years when this was published which of us was. 15. And 50 years. And. Life the infected person in the entry This was also developed a much earlier actually in the late 1950 S. to assess the effectiveness of the 1st generation of antidepressants it was a vision we published in 1960 so again it was it was not developed to measure depression and clients so much as to measure the effectiveness of antidepressant medications. And. It's now. That the most commonly used measure of depression so there are some there often issues come by the minute. Related to the fact that this that perhaps. This scale. Was developed by now conceptualize ation of depression might have been something different from one of his today all right so the last major review was found 950 of this I'm not sure if you show me 2003 so this is. Update 201517 items will question is on the sky right of Sky question. Section and let's take a look at the reliability of the Hamilton so we've got some. Information here. And looking reasonably good this is kind of putting together a list of many studies. Saying. If you know you know what information was contained within. You in those studies and. So it's talking about reliability and some statistics being used to cases are. So. In terms of internal life of the sea. The estimates range from point 462.97.97 courses 5 fabulous to the excellent point 46 it's a little bit. On the low and. But point 7 is his closer to accept to be the best we're looking for really his point 8 while high. Interests are a liability and this is this is a very important type of reliability this means. That you know because this is what happens in real life creations. Are using. In this case the Hamilton depression scale are they. Getting the same result. When they use this chaos and other clinicians so the pieces are here ranged from point A to point 98 that was good very good. But the individual item level so that was really the whole sky off here the size of the individual lots of novel into a survival using whole for many items and so that's. How some calls for concern. So here. This is the board state psychiatric rating scale should measure a single psycho form of psychopathological construct. You know. What we refer to. In the medical model we use as an illness or a syndrome and whether they are actually medical illnesses is another matter. Mentioned in the other. Video and become part of items that adequately cover a range of symptoms that are consistently associated with the syndrome so again we're coming back to the fact that. This scale is. Whether or not they come back to the question should say whether or not this scale. Catches depression as it is currently conceptualize this currently conceptualize. Her to death Nowadays the D.S.M. 5. We've already talked about whether or not the D.S.M. itself is valid and reliable. But that's what we take history. As the standard and so on a depression scale is then measure it against it's ability it's the ability of the scale is measured in terms of. How well it's able to capture what we know we conceptualize depression per the D.S.M. diagnostic criteria so here it's this paragraph here it's reasonable to ask whether this instrument catches depression as it is currently conceptualize several symptoms contained within the how time scale and not official D.S.M. diagnostic criteria although they are recognizes speech is associated with depression for example psyche XYZZY or other symptoms including included I don't and scale for example loss of inside hypochondriasis the link with depression is more tenuous war critically important features of D.S.M. for depression are often buried within more complex items and sometimes in all kinds of toll so it could be a problem since we are obliged in practice to use the D.S.M.. We need we need to VO to use in a major scale that's going to give us. A score that tells us whether or not the client has depression as it is defined in the D.S.M.. And no explicit assessment of feelings of worthlessness. OK she's something there in the D.S.M. knowledge. Doesn't capture. All right so anyway. Let's take a look at 2. So this was the conclusion or one of the confluence of this particular study was that the Hamilton depression scale is measuring concepts in a depression that is now several decades old and that is at best partly related to the operationalize ation of depression in D.S.M. 4 so maybe even be. Further removed from how the D.S.M. 5 sexualizes depression. Huge difference between D.S.M. $4.00 and $5.00. But nevertheless it's a concern. So then we take a look. Now. And think. So we can see how these 2 scales are. Different from each other even though they. May be same thing. Well 1st of all the number of items is different. Here. If we look at the way that. Both in both scales we add up the total score you see here that the. Back to Persian inventory. It says the cutoff of. 0 to 13 is minimal depression was this there's no score that tells you no depression. I see interesting whereas at least I have also and. You can not be depressed with a house. And then $8.00 to $12.00 when the House of depression is doubtful and Miles Wilder and severe. Which kind of sort of seems to equate to a mild more drip sit here on. The. The Bay It's the same word to use but whether it's. They are made the same meaning in terms of actual depressed state in the plan or less. Matter. But also what you can see here is some of the. Items have effectively a different $1080.00 in the houses scale whereas as we've mentioned previously we're talking about a bank that each He chides in his weighted equally So these these since we're adding the total score these items. Can these 4 from 0 to 2. Kind of have less weighting than those that are. Rated from 0 to 4. We should give that one for depressed mood as you can give this some new initiatives on. Maximum 2 So anyway that the the scales are different and so. The question is are they how they measuring the same thing and we've looked at the lives of the few who did see off the top of them in those elevations studies and so that would be what we're trying to make a decision as to which scale we're going to use. Those And those would be the deciding factor is the size things like practical things like ease of use and so on. And of course you where if we're planning to. Major Depression say in. Children. The wording of the question say. I think that. Well one would have to consider whether the would be is going to be understood as it's meant to be understood by a child this is an adult. So you eat what for your for your assignment. Let's say they say you choose. Depression chosen depression is on of your clients main problems so then you can use. Something like Google Scholar through V.F.S. universe and you can search for depression scale see what comes out or depression in Tory and you probably get lots of hits. Back and. Saw So the 1st step is to find scales. That seethes if they are. Potentially useful for what you want to do. Then go for validation studies of those particular scales once you got some of the scales and you go to whittle this down to 2 scales per problem so if you chosen depression you need to have 2 scales you could even use that back in the house and compare those 2. But again I ask you not to use the validation studies that I've presented these videos but find some feel. Free So for each scale you have to find 2. Validation studies so to fit in this case you need 2 for the bank and 2 for the Hamilton OK and you look at the. Reliability of booty statistics and used those and things like ease of use. To argue that OK I'm going to select the best because blah blah blah on the. Hamilton because all and give your reasons in terms of statistics and other factors that. Make that a better choice to go client OK All right you also have. Some work on this in your discussion board aside for this much. So.