Lisrel拟合指标中NNFI和CFI等于1甚至大于1是怎么回事？
程序如下：

DA NI=21 NO=120
KM FU
1.000 .578 .455 .536 .602 .177 .272 .121 .000 .011 .034 -.031 .041 .034 .034 .070 .064 -.007 .113 .113 .037
.578 1.000 .530 .519 .573 .311 .261 .238 .213 .147 .169 .007 .103 .190 .092 .235 .118 .176 .151 .156 .067
.455 .530 1.000 .499 .450 .176 .162 .221 .117 .120 .068 .050 .044 .150 -.046 .158 .098 .146 .082 .140 .136
.536 .519 .499 1.000 .460 .182 .215 .168 .178 .140 .123 .106 .101 .156 .037 .059 .047 .054 .042 .143 .181
.602 .573 .450 .460 1.000 .125 .203 .106 .105 .072 .138 -.024 .023 .121 .109 .163 .093 .174 .074 .130 .015
.177 .311 .176 .182 .125 1.000 .187 .165 .194 .113 .141 .112 .195 .189 -.001 .205 .020 .063 .210 .095 .073
.272 .261 .162 .215 .203 .187 1.000 .259 .214 .114 .286 .223 .314 .103 .037 .234 .010 .161 .234 .255 .036
.121 .238 .221 .168 .106 .165 .259 1.000 .245 .292 .222 .164 .197 .026 -.072 .144 .199 .188 .292 .070 -.050
.000 .213 .117 .178 .105 .194 .214 .245 1.000 .353 .329 .186 .373 .205 .145 .146 .151 .048 .106 .161 .168
.011 .147 .120 .140 .072 .113 .114 .292 .353 1.000 .261 .038 .327 .118 .089 .169 .150 .050 .209 .110 .135
.034 .169 .068 .123 .138 .141 .286 .222 .329 .261 1.000 .149 .334 .076 .111 .124 .032 .302 .177 .186 -.037
-.031 .007 .050 .106 -.024 .112 .223 .164 .186 .038 .149 1.000 .086 .098 .131 .042 -.024 .176 .074 .233 .022
.041 .103 .044 .101 .023 .195 .314 .197 .373 .327 .334 .086 1.000 .156 .115 .185 .146 .171 .249 .188 .111
.034 .190 .150 .156 .121 .189 .103 .026 .205 .118 .076 .098 .156 1.000 .153 .363 .302 .249 .206 .315 .168
.034 .092 -.046 .037 .109 -.001 .037 -.072 .145 .089 .111 .131 .115 .153 1.000 .081 .196 .408 .137 .172 .194
.070 .235 .158 .059 .163 .205 .234 .144 .146 .169 .124 .042 .185 .363 .081 1.000 .254 .251 .216 .264 .146
.064 .118 .098 .047 .093 .020 .010 .199 .151 .150 .032 -.024 .146 .302 .196 .254 1.000 .215 .287 .223 .306
-.007 .176 .146 .054 .174 .063 .161 .188 .048 .050 .302 .176 .171 .249 .408 .251 .215 1.000 .317 .222 .183
.113 .151 .082 .042 .074 .210 .234 .292 .106 .209 .177 .074 .249 .206 .137 .216 .287 .317 1.000 .262 -.053
.113 .156 .140 .143 .130 .095 .255 .070 .161 .110 .186 .233 .188 .315 .172 .264 .223 .222 .262 1.000 .087
.037 .067 .136 .181 .015 .073 .036 -.050 .168 .135 -.037 .022 .111 .168 .194 .146 .306 .183 -.053 .087 1.000
MO NX=21 NK=3 PH=ST
PA LX
5 (1 0 0)
8 (0 1 0)
8 (0 0 1)
OU

以上程序是一个验证性因子分析的程序，潜变量为3个，前5个项目为第一个潜变量的指标，中间8个项目为第二个潜变量的指标，最后8个项目是第三个潜变量的指标。