Jul 18th, 2010
I just don’t know what exactly. So, mostly as stream of consciousness and in chronological order… *This started when Lisa Thumann tweeted about a keynote speaker at BLC ’10 who referred to the so-called “10,000 hour rule” for mastery or expertise. *I asked her if the speaker had a warrant for that knowledge claim beyond [...]
Jun 7th, 2009
[NOTE: this is the final post in a series of posts about a report recently issued based on a study done by Marzano Research Laboratory. Part I is here, Part II is here, Part III is here, and Part IV is here.] PART V: SUMMARY AND RECOMMENDATIONS [NOTE #2: I know, I know...I'm a couple [...]
Jun 5th, 2009
[NOTE: this is the fourth in a series of posts about a report recently issued based on a study done by Marzano Research Laboratory. Part I is here, Part II is here, and Part III is here.] PART IV: INTERNAL VALIDITY “Internal Validity is the approximate truth about inferences regarding cause-effect or causal relationships” (Trochim, [...]
Jun 3rd, 2009
[NOTE: this is the third in a series of posts about a report recently issued based on a study done by Marzano Research Laboratory. Part I is here and Part II is here.] PART III: MEASUREMENT VALIDITY AND RELIABILITY As I wrote yesterday, Marzano and his research team had a “dependent variable problem.” That is, [...]
[NOTE: this is the second in a series of posts about a report recently issued based on a study done by Marzano Research Laboratory. Part I is here.] PART II: RESEARCH DESIGN ISSUES From a research design perspective, this study (or collection of studies?) is best described as unusual. In fact, what Marzano’s research team [...]