Director and writer
Roger Corman averages 5.46, Charles B. Griffith averages 5.18. Apart that suggests 5.32; together they average 5.19, a lift of −0.13.
Lift is the average of their films together minus the mean of their two career averages.
1960
1975
1986Dot size shows IMDb votes; lines are rolling five-film averages. Films with fewer than 1,000 votes are left out.
| Gunslinger | 1956 | 3.9 | 1,945 | Director, Producer | Writer |
| It Conquered the World | 1956 | 5.0 | 3,018 | Producer, Director | Writer |
| Attack of the Crab Monsters | 1957 | 4.9 | 4,535 | Producer, Director | Writer |
| Not of This Earth | 1957 | 6.1 | 2,752 | Producer, Director | Writer |
| Rock All Night | 1957 | · | 544 | Producer, Director | Writer |
| Teenage Doll | 1957 | · | 542 | Director, Producer | Writer |
| The Undead | 1957 | 4.8 | 2,923 | Producer, Director | Writer |
| A Bucket of Blood | 1959 | 6.7 | 9,080 | Producer, Director | Writer |
 The Little Shop of Horrors | 1960 | 6.2 | 21,569 | Writer, Producer, Director | Writer |
| Ski Troop Attack | 1960 | · | 699 | Director, Producer | Writer |
| Atlas | 1961 | · | 377 | Producer, Director | Writer |
| Creature from the Haunted Sea | 1961 | 3.5 | 3,621 | Director, Producer | Writer |
| The Wild Angels | 1966 | 5.6 | 3,912 | Director, Producer | Writer |
| Devil's Angels | 1967 | · | 633 | Producer | Writer (not counted) |
 Death Race 2000 | 1975 | 6.2 | 33,284 | Producer | Writer (not counted) |
| Eat My Dust | 1976 | 5.4 | 1,216 | Producer | Director, Writer (not counted) |
| Dr. Heckyl and Mr. Hype | 1980 | · | 696 | Writer | Writer, Director (not counted) |
| Smokey Bites the Dust | 1981 | · | 412 | Producer | Director (not counted) |
 Little Shop of Horrors | 1986 | 7.1 | 96,259 | Writer | Writer (not counted) |
