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The "Spliced Power Factor"

How the "Splicing" Was Done

In case the process is not obvious, here it is in literally graphic steps. First, here is the original "raw" power-factor graph:

half-sized power-factor graph

Now, by "snipping" at the three major discontinuities (1920/1921, 1976/1977, 1992/1994), we can cut that graph up into four distinct pieces, each a self-contained baseball era (as far as power goes):

slice 1 from power-factor graph       slice 2 from power-factor graph       slice 3 from power-factor graph       slice 4 from power-factor graph

Now all we have to do is slide those pieces down so that their ends align, meaning we are removing the artificial jumps that derive solely from the ball juicings between each adjacent pair of eras:

half-sized power-factor graph

And that (with the World War eras smoothed out for uniformity) gives us the final result:

half-sized spliced power-factor graph


(In fact, the spliced graph was not literally a graphics manipulation: the numbers were re-figured with the ball-jumps subtracted out and then the whole thing re-plotted; but the effect is exactly the same as what is shown above.)

This page is one of several each providing a detailed analysis of one or another of the chief claims about the use of PEDs (Performance-Enhancing Drugs) in baseball. Though each, including this one, can be read "stand-alone", you really should first read the main page here, which summarizes all of the findings and sets them out them in a coherent presentation.

You loaded this page on Monday, 27 February 2017, at 20:01 EST.;
it was last modified on Wednesday, 30 January 2008, at 22:25 EST.


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Site Directory:

Search this site, or the web:

  • Overview and Summary
    a summary presentation of what appears in much more detail on the pages listed below

  • Actual Baseball Effects of PEDs
    two distinct, detailed analytic examinations of how PEDs might affect baseball statistics and of whether they have in fact done so, and why or why not, with links to several other such studies

  • Changes in the Baseball
    full discussions of the methods and results of two unrelated laboratory examinations of baseballs from several different years to see if there have been performance-affecting changes in the ball over time

  • The "Spliced" Power Factor
    a more detailed graphic explanation of what the "spliced" power factor graph is and how it is created

  • Medical Effects of PEDs
    comprehensive reviews of all the medical-side-effect claims about steroids, hGH, and other PEDs, supported by extensive citations from the established scientific literature of medicine

  • PEDs as Healing Agents
    looking into the claim that PEDs augment count-type records by allowing players to participate in more games than they could without chemical help

  • Adolescent Use of PEDs
    hard, scientific data from multiple extensive, long-term surveys of adolescent use of PEDs, detailing the actual extent of use, the established reasons for such use, and the true significance of "role models" in PED use

  • Ethical Issues in the Use of Performance-Enhancing Substances
    what professional medical ethicists have to say about how PED use in sports should be evaluated and why

  • Baseball and PEDs: Further Resources
    a select list of thought-provoking articles, essays, and books, a number of which are not cited elsewhere in these pages

  • Drugs in Sports: a Bookshop
    a collection of books relevant to drugs and sports, available for sale from this site

  • Eric Walker: Links
    baseball-related web pages by, about, or citing the webmaster of this site

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