Dewey, Experientia, 32,416 (1976)
within each level category as the entry for that level. They were usually extremely significant.
Variations in type style are also used in these graphs to indicate the frequency of occurrence of an
effect. Characteristic phenomena are in bold capital letters, common are in bold lower case, infrequent
(fairly frequent is combined with infrequent here) in small capitals, and rare phenomena are set in capitals
with lower case letters. Thus if one wants to know what is very likely to happen at various levels for a
given category of phenomena, one can look only at the characteristic or common effects (in boldface). If
one wants to flesh this out with what may also happen if psychological factors assume the correct values,
all the phenomena may be looked at.
I have occasionally inserted question marks after particular phenomena on the graphs, indicating that
comments of informants raise some doubts as to its fitting into the minimal level model, i.e., it may cease
to be available after some higher level.
(5 of 7)4/15/2004 7:05:25 AM
On Being Stoned - Chapter 5
Each chapter contains a table summarizing the effects of all significant background factors. I have
combined the categories of frequency of use of marijuana in the last six months, total marijuana use, and
psychedelic drug use into a single category of more drug experience for convenience here. The reader
who needs these separated can go back to the original item descriptions in the text.
Almost all background variables had relatively linear effects. Where they did not, the text in this
section mentions the fact, and they are not included in the table.
In addition to the various statistical considerations mentioned above, it should be realized that about 5
percent of the significant differences reported herein are due only to chance, i.e., are not really reflecting a
genuine effect. In the many thousands of comparisons made in this large mass of data, 5 percent will
come out at the .05 level of probability by chance alone. I debated on whether to try to eliminate these
false positives, but the only way would be by the criterion of whether the differences "made sense" to me.
Rather than impose my judgment on the data, I have let it stand. As the main purpose of this study is to
stimulate research rather than provide final answers on the nature of marijuana intoxication, these
occasional false positives will be weeded out by lack of confirmation in future studies.
1. I have generally used percentages rather than actual numbers for clarity of presentation, All
statistical tests, however, were performed on the raw data to avoid the slight rounding errors involved in
using percentages. (back)
2. While it would have been possible to assign the intoxication levels the values 0, 1, 2, 3, and 4 and
use the arithmetic mean as the average value, I did not want to make the questionable assumption of equal
intervals between c
We stated that a metal screen is used first followed by a silk
screen. Nowadays steel fabrics can be bought in sizes that have much
smaller pours than even the finest silk screen.
You should typically look for a metal screen that is ranged
somewhere between 100 lines per inch to 140 per inch. A common
screen used by most home hash makers is a screen with 120 lines. A
wooden frame is constructed to hold the screen in place on one side.
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