1 / 16

POWER, PREDICTION, AND NEUROSCIENCE

POWER, PREDICTION, AND NEUROSCIENCE . Truth. Situation A Situation B. What you believe. Situation A Situation B. Truth. H0 HA. What you believe. H0 HA. H0: The null hypothesis. The default supposition that there is no effect.

soren
Download Presentation

POWER, PREDICTION, AND NEUROSCIENCE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. POWER, PREDICTION, AND NEUROSCIENCE

  2. Truth Situation A Situation B What you believe Situation A Situation B

  3. Truth H0 HA What you believe H0 HA

  4. H0: The null hypothesis. The default supposition that there is no effect. HA: The supposition that there is an effect POWER = Probability of detecting effect that actual exists

  5. BIG DATA IS ALL ABOUT STATISTICAL POWER “We’re now taking [that data] and making it actionable, telling doctors to focus on two intervention programs per factor and looking at the right interventions. The customer medicine is already here.” – Mark Palmer Aetna Insurance “The thing everyone’s trying to figure out is: Is there a way for you to find the two or three or four things that will guarantee you a win or at least tip the scale in your favor at any given time,”--Vasu Kulkarni Founder of Krossover “The Ford product development team was curious as to whether the Ford Escape sport-utility vehicle should have a standard liftgate (i.e., it opens manually and the rear window can flip open) or a power liftgate in which the glass and the gate are one piece. In the latter option, the gate opens automatically by tapping under the rear bumper with your foot, but the window doesn’t open at all.”

  6. Sources of Power: Size Of Effect

  7. Sources of Power: REPETITION

  8. Sources of Power fMRI Sales of Cereal • Multiple measures on the same family during different shopping trips • Repetition across different families • Repetition within a store • Specificity of measure • Repetition of stimuli across time • Repetition of subjects across experiments • Repetition of voxels within an area • Quality of stimuli

  9. A lot of data arranged across many dimensions may not be as big as it seems.

  10. More data does not help at all if the world changes …

  11. Uses data to change experience Does something to create data A device specifically designed to change in response to changing experience

More Related