macman76
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Inflated Albums

Hey again. This time I’m exploring rating inflation/deflation. Some albums on this site are rated by users who make an account and only rate their favorite albums (giving them 5s or 1s) and some come on to troll and rate things in a contrarian fashion (I’ll make a list exclusively on this phenomenon eventually). As a result, some albums may have an average that is above or below what it should if you took into account the fact that users may not be rating objectively. I applied ratings adjustments to the 7821 albums (every album that had a contrib/staff/emeritus review) I scraped on March 20th. I narrowed those albums down to those that had 250 or more album ratings which brought the total down to 1877 albums. The adjustment was as follows: whatever the mean of an individual user’s ratings in this dataset (for this example, let’s say user “x” has a 10 albums rated and his average is a 3.5) is subtracted from the average of the average ratings of the individual albums (let’s say the albums averaged a 3.6). Our user “x” is thus underrating the albums by 0.1 ratings points, so all of the ratings of his albums get 0.1 added to them. This is done for every user, and every album, from there, gets a weighted mean of the adjusted scores calculated (weight equal to the log2 of the number of ratings that user had, this is useful because if a user had one rating total, he/she gets a weight of 0). Presented are the 10 most inflated (meaning their average score is higher than their adjusted mean score) and 10 most deflated albums (average score < adjusted mean score). Presented, also, is the average rating of the album, adjusted mean, percent of users that had positive adjustments (meaning that their average rating was higher than the average rating of the albums they rated), and the median number of albums that users of that album had rated within this dataset of 7821 albums. After that, the top 10 and bottom 10 albums based on adjusted rating are presented.
1Special Request
Soul Music


And, of course, request albums to get these metrics from and I’ll post them(also, providing the name of both the band and album makes this easier), but note that if it was not reviewed by a contrib/staff/emeritus before March 20th, then I can’t provide it.
2Arghoslent
Hornets of the Pogrom


1) Deflated
Original Mean: 3.8754
Adjusted Mean: 4.1327
Difference: 0.2573
Percent of Positive User Adjustments: 20.18%
Median Number of Ratings per User: 190
3Tangerine Dream
Phaedra


2) Deflated
Original Mean: 4.1952
Adjusted Mean: 4.3809
Difference: 0.1857
Percent of Positive User Adjustments: 31.97%
Median Number of Ratings per User: 197
4Red House Painters
Red House Painters


3) Deflated
Original Mean: 4.2516
Adjusted Mean: 4.42
Difference: 0.1684
Percent of Positive User Adjustments: 31.09%
Median Number of Ratings per User: 237.5
5Leonard Cohen
Songs of Leonard Cohen


4) Deflated
Original Mean: 4.369
Adjusted Mean: 4.5358
Difference: 0.1668
Percent of Positive User Adjustments: 31.23%
Median Number of Ratings per User: 188
6Stars of the Lid
And Their Refinement Of The Decline


5) Deflated
Original Mean: 4.2644
Adjusted Mean: 4.4262
Difference: 0.1618
Percent of Positive User Adjustments: 30.51%
Median Number of Ratings per User: 249.5
7Off Minor
The Heat Death of the Universe


6) Deflated
Original Mean: 4.3603
Adjusted Mean: 4.5214
Difference: 0.1611
Percent of Positive User Adjustments: 30.23%
Median Number of Ratings per User: 217
8Grouper
Dragging a Dead Deer Up a Hill


7) Deflated
Original Mean: 4.0458
Adjusted Mean: 4.2064
Difference: 0.1606
Percent of Positive User Adjustments: 30.73%
Median Number of Ratings per User: 258
9Stars of the Lid
The Tired Sounds of Stars of the Lid


8) Deflated
Original Mean: 4.2436
Adjusted Mean: 4.4035
Difference: 0.16
Percent of Positive User Adjustments: 31.43%
Median Number of Ratings per User: 258
10Warning
Watching from a Distance


9) Deflated
Original Mean: 4.1997
Adjusted Mean: 4.3578
Difference: 0.1581
Percent of Positive User Adjustments: 25.53%
Median Number of Ratings per User: 243
11Bark Psychosis
Hex


10) Deflated
Original Mean: 4.1593
Adjusted Mean: 4.3171
Difference: 0.1579
Percent of Positive User Adjustments: 30.37%
Median Number of Ratings per User: 240.5
12I See Stars
Digital Renegade


1) Inflated
Original Mean: 2.9026
Adjusted Mean: 2.6643
Difference: -0.2383
Percent of Positive User Adjustments: 66.67%
Median Number of Ratings per User: 113
13All Time Low
Don't Panic


2) Inflated
Original Mean: 3.4259
Adjusted Mean: 3.1881
Difference: -0.2378
Percent of Positive User Adjustments: 69.02%
Median Number of Ratings per User: 101
14All Time Low
Nothing Personal


3) Inflated
Original Mean: 2.8901
Adjusted Mean: 2.6636
Difference: -0.2265
Percent of Positive User Adjustments: 63.13%
Median Number of Ratings per User: 86
15Black Veil Brides
Wretched and Divine


4) Inflated
Original Mean: 2.2888
Adjusted Mean: 2.0713
Difference: -0.2175
Percent of Positive User Adjustments: 61.3%
Median Number of Ratings per User: 117
16Green Day
iTRE!


5) Inflated
Original Mean: 2.8382
Adjusted Mean: 2.6248
Difference: -0.2135
Percent of Positive User Adjustments: 65.41%
Median Number of Ratings per User: 120.5
17Chevelle
Hats Off to the Bull


6) Inflated
Original Mean: 3.7333
Adjusted Mean: 3.5371
Difference: -0.1962
Percent of Positive User Adjustments: 63.8%
Median Number of Ratings per User: 99.5
18Green Day
1039/Smoothed Out Slappy Hours


7) Inflated
Original Mean: 3.5627
Adjusted Mean: 3.3677
Difference: -0.1949
Percent of Positive User Adjustments: 59.21%
Median Number of Ratings per User: 55
19Three Days Grace
Life Starts Now


8) Inflated
Original Mean: 2.8276
Adjusted Mean: 2.6372
Difference: -0.1904
Percent of Positive User Adjustments: 58.95%
Median Number of Ratings per User: 102
20The Offspring
Days Go By


9) Inflated
Original Mean: 2.9927
Adjusted Mean: 2.8032
Difference: -0.1895
Percent of Positive User Adjustments: 67.4%
Median Number of Ratings per User: 129
21Of Mice and Men
The Flood


10) Inflated
Original Mean: 3.4568
Adjusted Mean: 3.2684
Difference: -0.1884
Percent of Positive User Adjustments: 66.67%
Median Number of Ratings per User: 92
22Charles Mingus
The Black Saint and the Sinner Lady


1) Best Adjusted Album Means
Original Mean: 4.6067
Adjusted Mean: 4.7606
Difference: 0.1539
Percent of Positive User Adjustments: 32.74%
Median Number of Ratings per User: 170
23Miles Davis
Kind of Blue


2) Best Adjusted Album Means
Original Mean: 4.6217
Adjusted Mean: 4.6837
Difference: 0.062
Percent of Positive User Adjustments: 43.89%
Median Number of Ratings per User: 126
24Wu-Tang Clan
Enter the Wu-Tang (36 Chambers)


3) Best Adjusted Album Means
Original Mean: 4.6096
Adjusted Mean: 4.6469
Difference: 0.0373
Percent of Positive User Adjustments: 47.36%
Median Number of Ratings per User: 112
25Pink Floyd
Wish You Were Here


4) Best Adjusted Album Means
Original Mean: 4.6413
Adjusted Mean: 4.64
Difference: -0.0013
Percent of Positive User Adjustments: 53.39%
Median Number of Ratings per User: 84
26Pink Floyd
Live at Pompeii


5) Best Adjusted Album Means
Original Mean: 4.6011
Adjusted Mean: 4.6235
Difference: 0.0225
Percent of Positive User Adjustments: 50.18%
Median Number of Ratings per User: 109

Note: This list isn't exclusive to LPs (it could include EPs/Live Albums/Compilations)
27Unwound
Leaves Turn Inside You


6) Best Adjusted Album Means
Original Mean: 4.4713
Adjusted Mean: 4.5994
Difference: 0.1281
Percent of Positive User Adjustments: 35.9%
Median Number of Ratings per User: 209
28Stevie Wonder
Songs in the Key of Life


7) Best Adjusted Album Means
Original Mean: 4.5238
Adjusted Mean: 4.5915
Difference: 0.0677
Percent of Positive User Adjustments: 45.13%
Median Number of Ratings per User: 146
29DJ Shadow
Endtroducing...


8) Best Adjusted Album Means
Original Mean: 4.5209
Adjusted Mean: 4.5914
Difference: 0.0705
Percent of Positive User Adjustments: 41.95%
Median Number of Ratings per User: 142
30Minutemen
Double Nickels on the Dime


9) Best Adjusted Album Means
Original Mean: 4.452
Adjusted Mean: 4.5888
Difference: 0.1368
Percent of Positive User Adjustments: 35.98%
Median Number of Ratings per User: 170
31Talking Heads
Remain in Light


10) Best Adjusted Album Means
Original Mean: 4.4944
Adjusted Mean: 4.5879
Difference: 0.0935
Percent of Positive User Adjustments: 40.96%
Median Number of Ratings per User: 157
32Blood on the Dance Floor
Evolution


1) Worst Adjusted Album Means
Original Mean: 1.2508
Adjusted Mean: 1.1246
Difference: -0.1262
Percent of Positive User Adjustments: 59.93%
Median Number of Ratings per User: 120
33Justin Bieber
Under the Mistletoe


2) Worst Adjusted Album Means
Original Mean: 1.2199
Adjusted Mean: 1.1446
Difference: -0.0753
Percent of Positive User Adjustments: 60.59%
Median Number of Ratings per User: 120
34Queensryche
Dedicated to Chaos


3) Worst Adjusted Album Means
Original Mean: 1.2972
Adjusted Mean: 1.2203
Difference: -0.0769
Percent of Positive User Adjustments: 61.3%
Median Number of Ratings per User: 158
35Soulja Boy
Souljaboytellem.com


4) Worst Adjusted Album Means
Original Mean: 1.2128
Adjusted Mean: 1.2416
Difference: 0.0288
Percent of Positive User Adjustments: 40.23%
Median Number of Ratings per User: 110
36Lil Wayne
Rebirth


5) Worst Adjusted Album Means
Original Mean: 1.3268
Adjusted Mean: 1.2736
Difference: -0.0531
Percent of Positive User Adjustments: 52.87%
Median Number of Ratings per User: 128
37Justin Bieber
My World 2.0


6) Worst Adjusted Album Means
Original Mean: 1.3053
Adjusted Mean: 1.2848
Difference: -0.0206
Percent of Positive User Adjustments: 52.27%
Median Number of Ratings per User: 98.5
38Queensryche
Frequency Unknown


7) Worst Adjusted Album Means
Original Mean: 1.5111
Adjusted Mean: 1.4101
Difference: -0.101
Percent of Positive User Adjustments: 64.94%
Median Number of Ratings per User: 166
39Lou Reed and Metallica
Lulu


8) Worst Adjusted Album Means
Original Mean: 1.4152
Adjusted Mean: 1.4645
Difference: 0.0493
Percent of Positive User Adjustments: 46.17%
Median Number of Ratings per User: 182.5
40Bullet for My Valentine
Temper Temper


9) Worst Adjusted Album Means
Original Mean: 1.6236
Adjusted Mean: 1.536
Difference: -0.0876
Percent of Positive User Adjustments: 57.42%
Median Number of Ratings per User: 142
41Lil Wayne
I Am Not a Human Being II


10) Worst Adjusted Album Means
Original Mean: 1.6089
Adjusted Mean: 1.5364
Difference: -0.0725
Percent of Positive User Adjustments: 58.42%
Median Number of Ratings per User: 170
42Death
Symbolic


Original Mean: 4.5297
Adjusted Mean: 4.5405
Difference: 0.0108
Percent of Positive User Adjustments: 50.12%
Median Number of Ratings per User: 111
43Giant Squid
Cenotes


Original Mean: 3.8807
Adjusted Mean: 3.9592
Difference: 0.0785
Percent of Positive User Adjustments: 44.32%
Median Number of Ratings per User: 254
44Cryptopsy
None So Vile


Original Mean: 4.4059
Adjusted Mean: 4.470
Difference: 0.0641
Percent of Positive User Adjustments: 42.71%
Median Number of Ratings per User: 121
45Gamma Ray
Somewhere Out in Space


Original Mean: 4.2582
Adjusted Mean: 4.2276
Difference: -0.0306
Percent of Positive User Adjustments: 53.23%
Median Number of Ratings per User: 136
46Radiohead
OK Computer


Original Mean: 4.5712
Adjusted Mean: 4.5625
Difference: -0.0087
Percent of Positive User Adjustments: 52.77%
Median Number of Ratings per User: 84
47Modest Mouse
The Moon & Antarctica


Original Mean: 4.3276
Adjusted Mean: 4.3692
Difference: 0.0416
Percent of Positive User Adjustments: 47.25%
Median Number of Ratings per User: 126
48Coheed and Cambria
Live at the Starland Ballroom


Original Mean: 4.1773
Adjusted Mean: 4.0505
Difference: -0.1268
Percent of Positive User Adjustments: 60.56%
Median Number of Ratings per User: 58

Note: Most overrated among those that average more than a 4
49Kendrick Lamar
To Pimp a Butterfly


Original Mean: 4.405
Adjusted Mean: 4.3586
Difference: -0.0464
Percent of Positive User Adjustments: 56.95%
Median Number of Ratings per User: 121

Note: Most inflated among albums that average a 4.4. or more
50Deafheaven
Sunbather


Original Mean: 3.9863
Adjusted Mean: 4.0398
Difference: 0.0535
Percent of Positive User Adjustments: 48.24%
Median Number of Ratings per User: 145
51Deafheaven
New Bermuda


Original Mean: 3.7653
Adjusted Mean: 3.8039
Difference: 0.0386
Percent of Positive User Adjustments: 47.31%
Median Number of Ratings per User: 202
52Nirvana
In Utero


Original Mean: 4.1438
Adjusted Mean: 4.1288
Difference: -0.015
Percent of Positive User Adjustments: 52.14%
Median Number of Ratings per User: 95
53Radiohead
Kid A


Original Mean: 4.4494
Adjusted Mean: 4.4521
Difference: 0.0027
Percent of Positive User Adjustments: 52.05%
Median Number of Ratings per User: 92
54Pink Floyd
The Wall


Original Mean: 4.279
Adjusted Mean: 4.2494
Difference: -0.0296
Percent of Positive User Adjustments: 53.31%
Median Number of Ratings per User: 83
55Paysage d'Hiver
Winterkaelte


Original Mean: 4.246
Adjusted Mean: 4.3946
Difference: 0.1485
Percent of Positive User Adjustments: 30.16%
Median Number of Ratings per User: 239
56Godspeed You! Black Emperor
F#A# (Infinity)


Original Mean: 4.5036
Adjusted Mean: 4.5777
Difference: 0.0741
Percent of Positive User Adjustments: 42.92%
Median Number of Ratings per User: 136
57The Weakerthans
Left and Leaving


Original Mean: 4.1913
Adjusted Mean: 4.2914
Difference: 0.1
Percent of Positive User Adjustments: 36.01%
Median Number of Ratings per User: 211
58The Weakerthans
Reconstruction Site


Original Mean: 4.2423
Adjusted Mean: 4.3159
Difference: 0.0736
Percent of Positive User Adjustments: 41.13%
Median Number of Ratings per User: 188
59Universum
Mortuus Machina


Original Mean: 3.7701
Adjusted Mean: 3.0142
Difference: -0.7559
Percent of Positive User Adjustments:66.6% (m/)
Median Number of Ratings per User: 9 (Damn!)
60Deftones
Koi No Yokan


Original Mean: 4.0148
Adjusted Mean: 3.9587
Difference: -0.0561
Percent of Positive User Adjustments: 56.81%
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